diff --git a/apps/api/documents/api.js b/apps/api/documents/api.js
index 78d99621c..7956c7737 100644
--- a/apps/api/documents/api.js
+++ b/apps/api/documents/api.js
@@ -193,6 +193,9 @@
                             change: false/true // hide/show feature in de/pe/sse
                         } / false / true // if false/true - use as init value in de/pe. use instead of customization.spellcheck parameter
                     },
+                    font: {
+                        family: "Arial",
+                    },
                     chat: true,
                     comments: true,
                     zoom: 100,
diff --git a/apps/common/main/lib/component/DataView.js b/apps/common/main/lib/component/DataView.js
index 8bb1399aa..e2413e9d8 100644
--- a/apps/common/main/lib/component/DataView.js
+++ b/apps/common/main/lib/component/DataView.js
@@ -1368,12 +1368,30 @@ define([
                 props = {minScrollbarLength  : this.minScrollbarLength};
             this.scrollAlwaysVisible && (props.alwaysVisibleY = this.scrollAlwaysVisible);
 
-            if (top + menuH > docH ) {
-                innerEl.css('max-height', (docH - top - paddings - margins) + 'px');
-                this.scroller.update(props);
-            } else if ( top + menuH < docH && innerEl.height() < this.options.restoreHeight ) {
-                innerEl.css('max-height', (Math.min(docH - top - paddings - margins, this.options.restoreHeight)) + 'px');
-                this.scroller.update(props);
+            var menuUp = false;
+            if (this.parentMenu.menuAlign) {
+                var m = this.parentMenu.menuAlign.match(/^([a-z]+)-([a-z]+)/);
+                menuUp = (m[1]==='bl' || m[1]==='br');
+            }
+            if (menuUp) {
+                var bottom = top + menuH;
+                if (top<0) {
+                    innerEl.css('max-height', (bottom - paddings - margins) + 'px');
+                    menuRoot.css('top', 0);
+                    this.scroller.update(props);
+                } else if (top>0 && innerEl.height() < this.options.restoreHeight) {
+                    innerEl.css('max-height', (Math.min(bottom - paddings - margins, this.options.restoreHeight)) + 'px');
+                    menuRoot.css('top', bottom - menuRoot.outerHeight());
+                    this.scroller.update(props);
+                }
+            } else {
+                if (top + menuH > docH ) {
+                    innerEl.css('max-height', (docH - top - paddings - margins) + 'px');
+                    this.scroller.update(props);
+                } else if ( top + menuH < docH && innerEl.height() < this.options.restoreHeight ) {
+                    innerEl.css('max-height', (Math.min(docH - top - paddings - margins, this.options.restoreHeight)) + 'px');
+                    this.scroller.update(props);
+                }
             }
         },
 
diff --git a/apps/common/main/lib/component/Menu.js b/apps/common/main/lib/component/Menu.js
index c58a1b5f1..8b2c0e30d 100644
--- a/apps/common/main/lib/component/Menu.js
+++ b/apps/common/main/lib/component/Menu.js
@@ -145,7 +145,7 @@ define([
                 style       : '',
                 itemTemplate: null,
                 items       : [],
-                menuAlign   : 'tl-bl',
+                menuAlign   : 'tl-bl',//menu - parent
                 menuAlignEl : null,
                 offset      : [0, 0],
                 cyclic      : true,
diff --git a/apps/common/main/lib/controller/Desktop.js b/apps/common/main/lib/controller/Desktop.js
index 60a4cd401..b61fdfb1a 100644
--- a/apps/common/main/lib/controller/Desktop.js
+++ b/apps/common/main/lib/controller/Desktop.js
@@ -261,21 +261,21 @@ define([
                                 })).render($('#box-document-title #slot-btn-dt-home'));
                                 titlebuttons['home'] = {btn: header.btnHome};
 
-                                header.btnHome.on('click', event => {
+                                header.btnHome.on('click', function (e) {
                                     native.execCommand('title:button', JSON.stringify({click: "home"}));
                                 });
 
                                 $('#id-box-doc-name').on({
-                                    'dblclick': e => {
+                                    'dblclick': function (e) {
                                         native.execCommand('title:dblclick', JSON.stringify({x: e.originalEvent.screenX, y: e.originalEvent.screenY}))
                                     },
-                                    'mousedown': e => {
+                                    'mousedown': function (e) {
                                         native.execCommand('title:mousedown', JSON.stringify({x: e.originalEvent.screenX, y: e.originalEvent.screenY}))
                                     },
-                                    'mousemove': e => {
+                                    'mousemove': function (e) {
                                         native.execCommand('title:mousemove', JSON.stringify({x: e.originalEvent.screenX, y: e.originalEvent.screenY}))
                                     },
-                                    'mouseup': e => {
+                                    'mouseup': function (e) {
                                         native.execCommand('title:mouseup', JSON.stringify({x: e.originalEvent.screenX, y: e.originalEvent.screenY}))
                                     }
                                 });
diff --git a/apps/common/main/lib/util/htmlutils.js b/apps/common/main/lib/util/htmlutils.js
index d75a54d0a..aa0312061 100644
--- a/apps/common/main/lib/util/htmlutils.js
+++ b/apps/common/main/lib/util/htmlutils.js
@@ -68,6 +68,7 @@ if ( window.desktop ) {
                 delete params.uitheme;
             } else {
                 localStorage.setItem("ui-theme-id", theme.id);
+                localStorage.removeItem("ui-theme-use-system");
             }
 
             localStorage.removeItem("ui-theme");
diff --git a/apps/common/main/resources/img/toolbar/1x/text-box-horizontal.png b/apps/common/main/resources/img/toolbar/1x/text-box-horizontal.png
deleted file mode 100644
index 4dbaf0d6e..000000000
Binary files a/apps/common/main/resources/img/toolbar/1x/text-box-horizontal.png and /dev/null differ
diff --git a/apps/common/main/resources/img/toolbar/1x/text-box-vertical.png b/apps/common/main/resources/img/toolbar/1x/text-box-vertical.png
deleted file mode 100644
index 0aa4448aa..000000000
Binary files a/apps/common/main/resources/img/toolbar/1x/text-box-vertical.png and /dev/null differ
diff --git a/apps/common/main/resources/less/comments.less b/apps/common/main/resources/less/comments.less
index c911a59e1..97782a53e 100644
--- a/apps/common/main/resources/less/comments.less
+++ b/apps/common/main/resources/less/comments.less
@@ -70,7 +70,7 @@
         label {
             color: @text-normal-ie;
             color: @text-normal;
-            font: 12px arial;
+            font-size: 12px;
             line-height: normal;
             border-bottom: @scaled-one-px-value-ie dotted @text-normal-ie;
             border-bottom: @scaled-one-px-value dotted @text-normal;
@@ -120,7 +120,7 @@
 .dataview-ct {
     width: 100%;
     height: 100%;
-    font: 12px arial;
+    font-size: 12px;
     line-height: normal;
     position: relative;
     overflow: hidden;
diff --git a/apps/common/main/resources/less/common.less b/apps/common/main/resources/less/common.less
index aee84bd0f..b7c6f6918 100644
--- a/apps/common/main/resources/less/common.less
+++ b/apps/common/main/resources/less/common.less
@@ -298,4 +298,7 @@ body {
     &.pixel-ratio__1_75 {
         image-rendering: crisp-edges; // FF only
     }
+
+    font-family: @font-family-sans-serif;
+    font-family: @font-family-base;
 }
\ No newline at end of file
diff --git a/apps/common/main/resources/less/variables.less b/apps/common/main/resources/less/variables.less
index 0660a8c87..0fd142adc 100644
--- a/apps/common/main/resources/less/variables.less
+++ b/apps/common/main/resources/less/variables.less
@@ -60,7 +60,7 @@
 @font-family-serif:       Georgia, "Times New Roman", Times, serif;
 @font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
 @font-family-tahoma:      tahoma, arial, verdana, sans-serif;
-@font-family-base:        @font-family-sans-serif;
+@font-family-base:        var(--font-family-base-custom, @font-family-sans-serif), @font-family-sans-serif;
 
 @font-size-base:          11px;
 @font-size-large:         13px;
diff --git a/apps/documenteditor/embed/js/ApplicationController.js b/apps/documenteditor/embed/js/ApplicationController.js
index ae1d89786..9bd89517b 100644
--- a/apps/documenteditor/embed/js/ApplicationController.js
+++ b/apps/documenteditor/embed/js/ApplicationController.js
@@ -753,6 +753,19 @@ DE.ApplicationController = new(function(){
                 message = me.errorTokenExpire;
                 break;
 
+            case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                if (errData === 'pdf')
+                    message = me.errorInconsistentExtPdf.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'docx')
+                    message = me.errorInconsistentExtDocx.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'xlsx')
+                    message = me.errorInconsistentExtXlsx.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'pptx')
+                    message = me.errorInconsistentExtPptx.replace('%1', docConfig.fileType || '');
+                else
+                    message = me.errorInconsistentExt;
+                break;
+
             default:
                 message = me.errorDefaultMessage.replace('%1', id);
                 break;
@@ -962,6 +975,11 @@ DE.ApplicationController = new(function(){
         errorLoadingFont: 'Fonts are not loaded.<br>Please contact your Document Server administrator.',
         errorTokenExpire: 'The document security token has expired.<br>Please contact your Document Server administrator.',
         openErrorText: 'An error has occurred while opening the file',
-        textCtrl: 'Ctrl'
+        textCtrl: 'Ctrl',
+        errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+        errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
     }
 })();
\ No newline at end of file
diff --git a/apps/documenteditor/embed/locale/en.json b/apps/documenteditor/embed/locale/en.json
index 19ebd329f..f7ab19960 100644
--- a/apps/documenteditor/embed/locale/en.json
+++ b/apps/documenteditor/embed/locale/en.json
@@ -21,6 +21,11 @@
   "DE.ApplicationController.errorTokenExpire": "The document security token has expired.<br>Please contact your Document Server administrator.",
   "DE.ApplicationController.errorUpdateVersionOnDisconnect": "Connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.",
   "DE.ApplicationController.errorUserDrop": "The file cannot be accessed right now.",
+  "DE.ApplicationController.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "DE.ApplicationController.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "DE.ApplicationController.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "DE.ApplicationController.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "DE.ApplicationController.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "DE.ApplicationController.notcriticalErrorTitle": "Warning",
   "DE.ApplicationController.openErrorText": "An error has occurred while opening the file.",
   "DE.ApplicationController.scriptLoadError": "The connection is too slow, some of the components could not be loaded. Please reload the page.",
diff --git a/apps/documenteditor/forms/app/controller/ApplicationController.js b/apps/documenteditor/forms/app/controller/ApplicationController.js
index 2f86dcea2..3938469ce 100644
--- a/apps/documenteditor/forms/app/controller/ApplicationController.js
+++ b/apps/documenteditor/forms/app/controller/ApplicationController.js
@@ -301,6 +301,20 @@ define([
                     config.msg = this.errorTextFormWrongFormat;
                     break;
 
+                case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                    config.maxwidth = 600;
+                    if (errData === 'pdf')
+                        config.msg = this.errorInconsistentExtPdf.replace('%1', this.document.fileType || '');
+                    else if  (errData === 'docx')
+                        config.msg = this.errorInconsistentExtDocx.replace('%1', this.document.fileType || '');
+                    else if  (errData === 'xlsx')
+                        config.msg = this.errorInconsistentExtXlsx.replace('%1', this.document.fileType || '');
+                    else if  (errData === 'pptx')
+                        config.msg = this.errorInconsistentExtPptx.replace('%1', this.document.fileType || '');
+                    else
+                        config.msg = this.errorInconsistentExt;
+                    break;
+
                 default:
                     config.msg = (typeof id == 'string') ? id : this.errorDefaultMessage.replace('%1', id);
                     break;
@@ -1909,7 +1923,12 @@ define([
         textSaveAsDesktop: 'Save as...',
         warnLicenseExp: 'Your license has expired.<br>Please update your license and refresh the page.',
         titleLicenseExp: 'License expired',
-        errorTextFormWrongFormat: 'The value entered does not match the format of the field.'
+        errorTextFormWrongFormat: 'The value entered does not match the format of the field.',
+        errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+        errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
 
     }, DE.Controllers.ApplicationController));
 
diff --git a/apps/documenteditor/forms/locale/en.json b/apps/documenteditor/forms/locale/en.json
index 35aae0701..79c0ff02c 100644
--- a/apps/documenteditor/forms/locale/en.json
+++ b/apps/documenteditor/forms/locale/en.json
@@ -109,6 +109,11 @@
   "DE.Controllers.ApplicationController.errorUpdateVersionOnDisconnect": "Connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.",
   "DE.Controllers.ApplicationController.errorUserDrop": "The file cannot be accessed right now.",
   "DE.Controllers.ApplicationController.errorViewerDisconnect": "Connection is lost. You can still view the document,<br>but will not be able to download or print it until the connection is restored and page is reloaded.",
+  "DE.Controllers.ApplicationController.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "DE.Controllers.ApplicationController.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "DE.Controllers.ApplicationController.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "DE.Controllers.ApplicationController.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "DE.Controllers.ApplicationController.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "DE.Controllers.ApplicationController.mniImageFromFile": "Image from File",
   "DE.Controllers.ApplicationController.mniImageFromStorage": "Image from Storage",
   "DE.Controllers.ApplicationController.mniImageFromUrl": "Image from URL",
diff --git a/apps/documenteditor/main/app/controller/DocumentHolder.js b/apps/documenteditor/main/app/controller/DocumentHolder.js
index a9cbed995..1dfdd92a6 100644
--- a/apps/documenteditor/main/app/controller/DocumentHolder.js
+++ b/apps/documenteditor/main/app/controller/DocumentHolder.js
@@ -2367,7 +2367,7 @@ define([
                         store: group.get('groupStore'),
                         scrollAlwaysVisible: true,
                         showLast: false,
-                        restoreHeight: 10000,
+                        restoreHeight: 450,
                         itemTemplate: _.template(
                             '<div class="item-equation" style="" >' +
                             '<div class="equation-icon" style="background-position:<%= posX %>px <%= posY %>px;width:<%= width %>px;height:<%= height %>px;" id="<%= id %>"></div>' +
@@ -2381,6 +2381,12 @@ define([
                     });
                     menu.off('show:before', onShowBefore);
                 };
+                var bringForward = function (menu) {
+                    eqContainer.addClass('has-open-menu');
+                };
+                var sendBackward = function (menu) {
+                    eqContainer.removeClass('has-open-menu');
+                };
                 for (var i = 0; i < equationsStore.length; ++i) {
                     var equationGroup = equationsStore.at(i);
                     var btn = new Common.UI.Button({
@@ -2399,6 +2405,8 @@ define([
                         })
                     });
                     btn.menu.on('show:before', onShowBefore);
+                    btn.menu.on('show:before', bringForward);
+                    btn.menu.on('hide:after', sendBackward);
                     me.equationBtns.push(btn);
                 }
 
@@ -2430,8 +2438,14 @@ define([
                 showPoint[1] = bounds[3] + 10;
                 !Common.Utils.InternalSettings.get("de-hidden-rulers") && (showPoint[1] -= 26);
             }
-            eqContainer.css({left: showPoint[0], top : Math.min(this._Height - eqContainer.outerHeight(), Math.max(0, showPoint[1]))});
-            // menu.menuAlign = validation ? 'tr-br' : 'tl-bl';
+            showPoint[1] = Math.min(me._Height - eqContainer.outerHeight(), Math.max(0, showPoint[1]));
+            eqContainer.css({left: showPoint[0], top : showPoint[1]});
+
+            var menuAlign = (me._Height - showPoint[1] - eqContainer.outerHeight() < 220) ? 'bl-tl' : 'tl-bl';
+            me.equationBtns.forEach(function(item){
+                item && (item.menu.menuAlign = menuAlign);
+            });
+            me.equationSettingsBtn.menu.menuAlign = menuAlign;
             if (eqContainer.is(':visible')) {
                 if (me.equationSettingsBtn.menu.isVisible()) {
                     me.equationSettingsBtn.menu.options.initMenu();
diff --git a/apps/documenteditor/main/app/controller/Main.js b/apps/documenteditor/main/app/controller/Main.js
index 660fc7184..114d6afa3 100644
--- a/apps/documenteditor/main/app/controller/Main.js
+++ b/apps/documenteditor/main/app/controller/Main.js
@@ -380,6 +380,19 @@ define([
                     Common.Utils.InternalSettings.set("guest-username", value);
                     Common.Utils.InternalSettings.set("save-guest-username", !!value);
                 }
+                if (this.appOptions.customization.font) {
+                    if (this.appOptions.customization.font.family && typeof this.appOptions.customization.font.family === 'string') {
+                        var arr = this.appOptions.customization.font.family.split(',');
+                        for (var i=0; i<arr.length; i++) {
+                            var item = arr[i].trim();
+                            if (item && (/[\s0-9\.]/).test(item)) {
+                                arr[i] = "'" + item + "'";
+                            }
+                        }
+                        document.documentElement.style.setProperty("--font-family-base-custom", arr.join(','));
+                    }
+                }
+
                 this.editorConfig.user          =
                 this.appOptions.user            = Common.Utils.fillUserInfo(this.editorConfig.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous,
                                                                             Common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
@@ -1418,7 +1431,8 @@ define([
                         });
                     }
                 } else if (!this.appOptions.isDesktopApp && !this.appOptions.canBrandingExt &&
-                            this.editorConfig && this.editorConfig.customization && (this.editorConfig.customization.loaderName || this.editorConfig.customization.loaderLogo)) {
+                            this.editorConfig && this.editorConfig.customization && (this.editorConfig.customization.loaderName || this.editorConfig.customization.loaderLogo ||
+                                                                                     this.editorConfig.customization.font && this.editorConfig.customization.font.family)) {
                     Common.UI.warning({
                         title: this.textPaidFeature,
                         msg  : this.textCustomLoader,
@@ -1983,6 +1997,20 @@ define([
                         config.msg = this.errorPasswordIsNotCorrect;
                         break;
 
+                    case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                        config.maxwidth = 600;
+                        if (errData === 'pdf')
+                            config.msg = this.errorInconsistentExtPdf.replace('%1', this.document.fileType || '');
+                        else if  (errData === 'docx')
+                            config.msg = this.errorInconsistentExtDocx.replace('%1', this.document.fileType || '');
+                        else if  (errData === 'xlsx')
+                            config.msg = this.errorInconsistentExtXlsx.replace('%1', this.document.fileType || '');
+                        else if  (errData === 'pptx')
+                            config.msg = this.errorInconsistentExtPptx.replace('%1', this.document.fileType || '');
+                        else
+                            config.msg = this.errorInconsistentExt;
+                        break;
+
                     default:
                         config.msg = (typeof id == 'string') ? id : this.errorDefaultMessage.replace('%1', id);
                         break;
@@ -3287,7 +3315,12 @@ define([
             errorPasswordIsNotCorrect: 'The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.',
             confirmMaxChangesSize: 'The size of actions exceeds the limitation set for your server.<br>Press "Undo" to cancel your last action or press "Continue" to keep action locally (you need to download the file or copy its content to make sure nothing is lost).',
             textUndo: 'Undo',
-            textContinue: 'Continue'
+            textContinue: 'Continue',
+            errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+            errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
         }
     })(), DE.Controllers.Main || {}))
 });
\ No newline at end of file
diff --git a/apps/documenteditor/main/app/view/FileMenu.js b/apps/documenteditor/main/app/view/FileMenu.js
index b9700e008..2e38656d7 100644
--- a/apps/documenteditor/main/app/view/FileMenu.js
+++ b/apps/documenteditor/main/app/view/FileMenu.js
@@ -69,7 +69,7 @@ define([
                         if (item.options.action === 'help') {
                             if ( panel.noHelpContents === true && navigator.onLine ) {
                                 this.fireEvent('item:click', [this, 'external-help', true]);
-                                window.open(panel.urlHelpCenter, '_blank');
+                                !!panel.urlHelpCenter && window.open(panel.urlHelpCenter, '_blank');
                                 return;
                             }
                         }
diff --git a/apps/documenteditor/main/app/view/FileMenuPanels.js b/apps/documenteditor/main/app/view/FileMenuPanels.js
index 90e026adc..fde5f54ef 100644
--- a/apps/documenteditor/main/app/view/FileMenuPanels.js
+++ b/apps/documenteditor/main/app/view/FileMenuPanels.js
@@ -2019,7 +2019,14 @@ define([
             this.menu = options.menu;
             this.urlPref = 'resources/help/{{DEFAULT_LANG}}/';
             this.openUrl = null;
-            this.urlHelpCenter = '{{HELP_CENTER_WEB_DE}}';
+
+            if ( !Common.Utils.isIE ) {
+                if ( /^https?:\/\//.test('{{HELP_CENTER_WEB_DE}}') ) {
+                    const _url_obj = new URL('{{HELP_CENTER_WEB_DE}}');
+                    _url_obj.searchParams.set('lang', Common.Locale.getCurrentLanguage());
+                    this.urlHelpCenter = _url_obj.toString();
+                }
+            }
 
             this.en_data = [
                 {"src": "ProgramInterface/ProgramInterface.htm", "name": "Introducing Document Editor user interface", "headername": "Program Interface"},
diff --git a/apps/documenteditor/main/locale/en.json b/apps/documenteditor/main/locale/en.json
index 78bc75cfc..cf84c0ab6 100644
--- a/apps/documenteditor/main/locale/en.json
+++ b/apps/documenteditor/main/locale/en.json
@@ -765,6 +765,11 @@
   "DE.Controllers.Main.errorUserDrop": "The file cannot be accessed right now.",
   "DE.Controllers.Main.errorUsersExceed": "The number of users allowed by the pricing plan was exceeded",
   "DE.Controllers.Main.errorViewerDisconnect": "Connection is lost. You can still view the document,<br>but will not be able to download or print it until the connection is restored and page is reloaded.",
+  "DE.Controllers.Main.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "DE.Controllers.Main.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "DE.Controllers.Main.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "DE.Controllers.Main.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "DE.Controllers.Main.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "DE.Controllers.Main.leavePageText": "You have unsaved changes in this document. Click \"Stay on This Page\", then \"Save\" to save them. Click \"Leave This Page\" to discard all the unsaved changes.",
   "DE.Controllers.Main.leavePageTextOnClose": "All unsaved changes in this document will be lost.<br> Click \"Cancel\" then \"Save\" to save them. Click \"OK\" to discard all the unsaved changes.",
   "DE.Controllers.Main.loadFontsTextText": "Loading data...",
diff --git a/apps/documenteditor/main/resources/less/toolbar.less b/apps/documenteditor/main/resources/less/toolbar.less
index e7f419c33..0f8711ab4 100644
--- a/apps/documenteditor/main/resources/less/toolbar.less
+++ b/apps/documenteditor/main/resources/less/toolbar.less
@@ -130,7 +130,7 @@
     border-radius: 0;
     padding: 3px 10px;
     color: #ffffff;
-    font: 11px arial;
+    .font-size-normal();
     white-space: nowrap;
     letter-spacing: 1px;
     overflow: hidden;
@@ -179,7 +179,9 @@
     .separator {
         height: 20px;
     }
-    z-index: @zindex-dropdown - 19;
+    &.has-open-menu {
+        z-index: @zindex-navbar + 1;
+    }
 }
 
 .dropdown-menu.list-settings-level {
diff --git a/apps/documenteditor/mobile/locale/az.json b/apps/documenteditor/mobile/locale/az.json
index 303e32b14..f40713436 100644
--- a/apps/documenteditor/mobile/locale/az.json
+++ b/apps/documenteditor/mobile/locale/az.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Məlumat yüklənir...",
diff --git a/apps/documenteditor/mobile/locale/be.json b/apps/documenteditor/mobile/locale/be.json
index b3fa8fa3d..cf54733b1 100644
--- a/apps/documenteditor/mobile/locale/be.json
+++ b/apps/documenteditor/mobile/locale/be.json
@@ -420,7 +420,12 @@
     "openErrorText": "An error has occurred while opening the file",
     "saveErrorText": "An error has occurred while saving the file",
     "scriptLoadError": "The connection is too slow, some of the components could not be loaded. Please, reload the page.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Загрузка даных…",
diff --git a/apps/documenteditor/mobile/locale/bg.json b/apps/documenteditor/mobile/locale/bg.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/bg.json
+++ b/apps/documenteditor/mobile/locale/bg.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/ca.json b/apps/documenteditor/mobile/locale/ca.json
index cdd4dbf15..48c26e0f4 100644
--- a/apps/documenteditor/mobile/locale/ca.json
+++ b/apps/documenteditor/mobile/locale/ca.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Error desconegut.",
     "uploadImageExtMessage": "Format d'imatge desconegut.",
     "uploadImageFileCountMessage": "No s'ha carregat cap imatge.",
-    "uploadImageSizeMessage": "La imatge és massa gran. La mida màxima és de 25 MB."
+    "uploadImageSizeMessage": "La imatge és massa gran. La mida màxima és de 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "S'estan carregant les dades...",
diff --git a/apps/documenteditor/mobile/locale/cs.json b/apps/documenteditor/mobile/locale/cs.json
index a2e816f71..a731afca7 100644
--- a/apps/documenteditor/mobile/locale/cs.json
+++ b/apps/documenteditor/mobile/locale/cs.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "Nenahrány žádné obrázky.",
     "uploadImageSizeMessage": "Obrázek je příliš velký. Maximální velikost je 25 MB.",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Načítání dat...",
diff --git a/apps/documenteditor/mobile/locale/da.json b/apps/documenteditor/mobile/locale/da.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/da.json
+++ b/apps/documenteditor/mobile/locale/da.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/de.json b/apps/documenteditor/mobile/locale/de.json
index e6fb09dff..d50c0eace 100644
--- a/apps/documenteditor/mobile/locale/de.json
+++ b/apps/documenteditor/mobile/locale/de.json
@@ -420,7 +420,12 @@
     "uploadImageExtMessage": "Unbekanntes Bildformat.",
     "uploadImageFileCountMessage": "Keine Bilder hochgeladen.",
     "uploadImageSizeMessage": "Die maximal zulässige Bildgröße von 25 MB ist überschritten.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Daten werden geladen...",
diff --git a/apps/documenteditor/mobile/locale/el.json b/apps/documenteditor/mobile/locale/el.json
index 13d052642..36d6316d5 100644
--- a/apps/documenteditor/mobile/locale/el.json
+++ b/apps/documenteditor/mobile/locale/el.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "Δεν μεταφορτώθηκαν εικόνες.",
     "uploadImageSizeMessage": "Η εικόνα είναι πολύ μεγάλη. Το μέγιστο μέγεθος είναι 25MB.",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Φόρτωση δεδομένων...",
diff --git a/apps/documenteditor/mobile/locale/en.json b/apps/documenteditor/mobile/locale/en.json
index 5baa1d7fc..e60eff0e5 100644
--- a/apps/documenteditor/mobile/locale/en.json
+++ b/apps/documenteditor/mobile/locale/en.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/es.json b/apps/documenteditor/mobile/locale/es.json
index 842217e88..4529dde04 100644
--- a/apps/documenteditor/mobile/locale/es.json
+++ b/apps/documenteditor/mobile/locale/es.json
@@ -420,7 +420,12 @@
     "uploadImageExtMessage": "Formato de imagen desconocido.",
     "uploadImageFileCountMessage": "No hay imágenes subidas.",
     "uploadImageSizeMessage": "La imagen es demasiado grande. El tamaño máximo es de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Cargando datos...",
diff --git a/apps/documenteditor/mobile/locale/eu.json b/apps/documenteditor/mobile/locale/eu.json
index 9ca4b2e40..e6e0968b6 100644
--- a/apps/documenteditor/mobile/locale/eu.json
+++ b/apps/documenteditor/mobile/locale/eu.json
@@ -420,7 +420,12 @@
     "uploadImageExtMessage": "Irudi-formatu ezezaguna.",
     "uploadImageFileCountMessage": "Ez da irudirik kargatu.",
     "uploadImageSizeMessage": "Irudia handiegia da. Gehienezko tamaina 25 MB da.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Datuak kargatzen...",
diff --git a/apps/documenteditor/mobile/locale/fi.json b/apps/documenteditor/mobile/locale/fi.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/fi.json
+++ b/apps/documenteditor/mobile/locale/fi.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/fr.json b/apps/documenteditor/mobile/locale/fr.json
index f7e6f2e9f..ff268136d 100644
--- a/apps/documenteditor/mobile/locale/fr.json
+++ b/apps/documenteditor/mobile/locale/fr.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Erreur inconnue.",
     "uploadImageExtMessage": "Format d'image inconnu.",
     "uploadImageFileCountMessage": "Aucune image chargée.",
-    "uploadImageSizeMessage": "L'image est trop grande. La taille limite est de 25 Mo."
+    "uploadImageSizeMessage": "L'image est trop grande. La taille limite est de 25 Mo.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Chargement des données en cours...",
diff --git a/apps/documenteditor/mobile/locale/gl.json b/apps/documenteditor/mobile/locale/gl.json
index ecef1fe8e..15ec65857 100644
--- a/apps/documenteditor/mobile/locale/gl.json
+++ b/apps/documenteditor/mobile/locale/gl.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "Non hai imaxes subidas.",
     "uploadImageSizeMessage": "A imaxe é demasiado grande. O tamaño máximo é de 25 MB.",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Cargando datos...",
diff --git a/apps/documenteditor/mobile/locale/hu.json b/apps/documenteditor/mobile/locale/hu.json
index 46f49bb5b..7afe717ab 100644
--- a/apps/documenteditor/mobile/locale/hu.json
+++ b/apps/documenteditor/mobile/locale/hu.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Ismeretlen hiba.",
     "uploadImageExtMessage": "Ismeretlen képformátum.",
     "uploadImageFileCountMessage": "Nincsenek feltöltött képek.",
-    "uploadImageSizeMessage": "A kép túl nagy. A maximális méret 25 MB."
+    "uploadImageSizeMessage": "A kép túl nagy. A maximális méret 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Adatok betöltése...",
diff --git a/apps/documenteditor/mobile/locale/hy.json b/apps/documenteditor/mobile/locale/hy.json
index 18db0af88..40d587c06 100644
--- a/apps/documenteditor/mobile/locale/hy.json
+++ b/apps/documenteditor/mobile/locale/hy.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Անհայտ սխալ։",
     "uploadImageExtMessage": "Նկարի անհայտ ձևաչափ։",
     "uploadImageFileCountMessage": "Ոչ մի նկար չի բեռնվել։",
-    "uploadImageSizeMessage": "Պատկերը չափազանց մեծ է:Առավելագույն չափը 25 ՄԲ է:"
+    "uploadImageSizeMessage": "Պատկերը չափազանց մեծ է:Առավելագույն չափը 25 ՄԲ է:",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Տվյալների բեռնում...",
diff --git a/apps/documenteditor/mobile/locale/id.json b/apps/documenteditor/mobile/locale/id.json
index 346f502be..fdb771e25 100644
--- a/apps/documenteditor/mobile/locale/id.json
+++ b/apps/documenteditor/mobile/locale/id.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Kesalahan tidak diketahui.",
     "uploadImageExtMessage": "Format gambar tidak dikenal.",
     "uploadImageFileCountMessage": "Tidak ada gambar yang diunggah.",
-    "uploadImageSizeMessage": "Melebihi ukuran maksimal file. Ukuran maksimum adalah 25 MB."
+    "uploadImageSizeMessage": "Melebihi ukuran maksimal file. Ukuran maksimum adalah 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Memuat data...",
diff --git a/apps/documenteditor/mobile/locale/it.json b/apps/documenteditor/mobile/locale/it.json
index f2ccfc6bf..82ce1f480 100644
--- a/apps/documenteditor/mobile/locale/it.json
+++ b/apps/documenteditor/mobile/locale/it.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "Nessuna immagine caricata.",
     "uploadImageSizeMessage": "L'immagine è troppo grande. La dimensione massima è 25 MB.",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Caricamento di dati...",
diff --git a/apps/documenteditor/mobile/locale/ja.json b/apps/documenteditor/mobile/locale/ja.json
index 774fd87c1..caff32124 100644
--- a/apps/documenteditor/mobile/locale/ja.json
+++ b/apps/documenteditor/mobile/locale/ja.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "不明なエラー",
     "uploadImageExtMessage": "不明なイメージの形式",
     "uploadImageFileCountMessage": "アップロードしたイメージがない",
-    "uploadImageSizeMessage": "イメージのサイズの上限が超えさせました。サイズの上限が２５MB。"
+    "uploadImageSizeMessage": "イメージのサイズの上限が超えさせました。サイズの上限が２５MB。",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "データの読み込み中...",
diff --git a/apps/documenteditor/mobile/locale/ko.json b/apps/documenteditor/mobile/locale/ko.json
index 727c7db81..ac2bd4ddb 100644
--- a/apps/documenteditor/mobile/locale/ko.json
+++ b/apps/documenteditor/mobile/locale/ko.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "데이터로드 중 ...",
diff --git a/apps/documenteditor/mobile/locale/lo.json b/apps/documenteditor/mobile/locale/lo.json
index b61c1eac9..eca5d48fd 100644
--- a/apps/documenteditor/mobile/locale/lo.json
+++ b/apps/documenteditor/mobile/locale/lo.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "ກຳລັງດາວໂຫຼດຂໍ້ມູນ...",
diff --git a/apps/documenteditor/mobile/locale/lv.json b/apps/documenteditor/mobile/locale/lv.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/lv.json
+++ b/apps/documenteditor/mobile/locale/lv.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/ms.json b/apps/documenteditor/mobile/locale/ms.json
index 7cd4461e9..a9ef83a1f 100644
--- a/apps/documenteditor/mobile/locale/ms.json
+++ b/apps/documenteditor/mobile/locale/ms.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "Tiada Imej dimuat naik.",
     "uploadImageSizeMessage": "Imej terlalu besar. Saiz maksimum adalah 25 MB.",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Data dimuatkan…",
diff --git a/apps/documenteditor/mobile/locale/nb.json b/apps/documenteditor/mobile/locale/nb.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/nb.json
+++ b/apps/documenteditor/mobile/locale/nb.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/nl.json b/apps/documenteditor/mobile/locale/nl.json
index efbea29fc..04e7003df 100644
--- a/apps/documenteditor/mobile/locale/nl.json
+++ b/apps/documenteditor/mobile/locale/nl.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Gegevens worden geladen...",
diff --git a/apps/documenteditor/mobile/locale/pl.json b/apps/documenteditor/mobile/locale/pl.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/pl.json
+++ b/apps/documenteditor/mobile/locale/pl.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/pt-pt.json b/apps/documenteditor/mobile/locale/pt-pt.json
index 93a23c626..3b5389a10 100644
--- a/apps/documenteditor/mobile/locale/pt-pt.json
+++ b/apps/documenteditor/mobile/locale/pt-pt.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Erro desconhecido.",
     "uploadImageExtMessage": "Formato de imagem desconhecido.",
     "uploadImageFileCountMessage": "Nenhuma imagem foi carregada.",
-    "uploadImageSizeMessage": "A imagem é muito grande. O tamanho máximo é de 25 MB."
+    "uploadImageSizeMessage": "A imagem é muito grande. O tamanho máximo é de 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "A carregar dados...",
diff --git a/apps/documenteditor/mobile/locale/pt.json b/apps/documenteditor/mobile/locale/pt.json
index babe90687..81e36ea67 100644
--- a/apps/documenteditor/mobile/locale/pt.json
+++ b/apps/documenteditor/mobile/locale/pt.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Erro desconhecido.",
     "uploadImageExtMessage": "Formato de imagem desconhecido.",
     "uploadImageFileCountMessage": "Sem imagens carregadas.",
-    "uploadImageSizeMessage": "Tamanho limite máximo da imagem excedido. O tamanho máximo é de 25 MB."
+    "uploadImageSizeMessage": "Tamanho limite máximo da imagem excedido. O tamanho máximo é de 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Carregando dados...",
diff --git a/apps/documenteditor/mobile/locale/ro.json b/apps/documenteditor/mobile/locale/ro.json
index bcb17a665..777c09aa2 100644
--- a/apps/documenteditor/mobile/locale/ro.json
+++ b/apps/documenteditor/mobile/locale/ro.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "Nicio imagine nu a fost încărcată.",
     "uploadImageSizeMessage": "Imaginea este prea mare. Limita de dimensiune este de 25 MB.",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Încărcarea datelor...",
diff --git a/apps/documenteditor/mobile/locale/ru.json b/apps/documenteditor/mobile/locale/ru.json
index 7b33a4d08..e1c64f8c6 100644
--- a/apps/documenteditor/mobile/locale/ru.json
+++ b/apps/documenteditor/mobile/locale/ru.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "Неизвестная ошибка.",
     "uploadImageExtMessage": "Неизвестный формат рисунка.",
     "uploadImageFileCountMessage": "Ни одного рисунка не загружено.",
-    "uploadImageSizeMessage": "Слишком большой рисунок. Максимальный размер - 25 MB."
+    "uploadImageSizeMessage": "Слишком большой рисунок. Максимальный размер - 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Загрузка данных...",
diff --git a/apps/documenteditor/mobile/locale/sk.json b/apps/documenteditor/mobile/locale/sk.json
index ece5571ac..ad8329a8d 100644
--- a/apps/documenteditor/mobile/locale/sk.json
+++ b/apps/documenteditor/mobile/locale/sk.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Načítavanie dát...",
diff --git a/apps/documenteditor/mobile/locale/sl.json b/apps/documenteditor/mobile/locale/sl.json
index e20a604ca..ced306d75 100644
--- a/apps/documenteditor/mobile/locale/sl.json
+++ b/apps/documenteditor/mobile/locale/sl.json
@@ -648,7 +648,12 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/sv.json b/apps/documenteditor/mobile/locale/sv.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/sv.json
+++ b/apps/documenteditor/mobile/locale/sv.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/tr.json b/apps/documenteditor/mobile/locale/tr.json
index 2eacfe819..a84d65fa0 100644
--- a/apps/documenteditor/mobile/locale/tr.json
+++ b/apps/documenteditor/mobile/locale/tr.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Veri yükleniyor...",
diff --git a/apps/documenteditor/mobile/locale/uk.json b/apps/documenteditor/mobile/locale/uk.json
index 84deb7514..f95e1784d 100644
--- a/apps/documenteditor/mobile/locale/uk.json
+++ b/apps/documenteditor/mobile/locale/uk.json
@@ -420,7 +420,12 @@
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Завантаження даних...",
diff --git a/apps/documenteditor/mobile/locale/vi.json b/apps/documenteditor/mobile/locale/vi.json
index 75e679405..2bc05b84d 100644
--- a/apps/documenteditor/mobile/locale/vi.json
+++ b/apps/documenteditor/mobile/locale/vi.json
@@ -423,7 +423,12 @@
     "errorEmptyTOC": "Start creating a table of contents by applying a heading style from the Styles gallery to the selected text.",
     "errorNoTOC": "There's no table of contents to update. You can insert one from the References tab.",
     "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/documenteditor/mobile/locale/zh-tw.json b/apps/documenteditor/mobile/locale/zh-tw.json
index ee5ce8bfa..fd797bc88 100644
--- a/apps/documenteditor/mobile/locale/zh-tw.json
+++ b/apps/documenteditor/mobile/locale/zh-tw.json
@@ -420,7 +420,12 @@
     "uploadImageFileCountMessage": "無上傳圖片。",
     "uploadImageSizeMessage": "圖像超出最大大小限制。最大為25MB。",
     "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
-    "errorTextFormWrongFormat": "The value entered does not match the format of the field."
+    "errorTextFormWrongFormat": "The value entered does not match the format of the field.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "載入資料中...",
diff --git a/apps/documenteditor/mobile/locale/zh.json b/apps/documenteditor/mobile/locale/zh.json
index dc4b98332..2c8546dc6 100644
--- a/apps/documenteditor/mobile/locale/zh.json
+++ b/apps/documenteditor/mobile/locale/zh.json
@@ -420,7 +420,12 @@
     "unknownErrorText": "未知错误。",
     "uploadImageExtMessage": "未知图像格式。",
     "uploadImageFileCountMessage": "没有图片上传",
-    "uploadImageSizeMessage": "图片太大了。最大允许的大小是 25 MB."
+    "uploadImageSizeMessage": "图片太大了。最大允许的大小是 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "数据加载中…",
diff --git a/apps/documenteditor/mobile/src/controller/Error.jsx b/apps/documenteditor/mobile/src/controller/Error.jsx
index f06fbce0c..73cf934e4 100644
--- a/apps/documenteditor/mobile/src/controller/Error.jsx
+++ b/apps/documenteditor/mobile/src/controller/Error.jsx
@@ -3,7 +3,7 @@ import { inject } from 'mobx-react';
 import { f7 } from 'framework7-react';
 import { useTranslation } from 'react-i18next';
 
-const ErrorController = inject('storeAppOptions')(({storeAppOptions, LoadingDocument}) => {
+const ErrorController = inject('storeAppOptions','storeDocumentInfo')(({storeAppOptions, storeDocumentInfo, LoadingDocument}) => {
     const { t } = useTranslation();
     const _t = t("Error", { returnObjects: true });
 
@@ -197,6 +197,20 @@ const ErrorController = inject('storeAppOptions')(({storeAppOptions, LoadingDocu
                 config.msg = _t.errorDirectUrl;
                 break;
 
+            case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                let docExt = storeDocumentInfo.dataDoc ? storeDocumentInfo.dataDoc.fileType || '' : '';
+                if (errData === 'pdf')
+                    config.msg = _t.errorInconsistentExtPdf.replace('%1', docExt);
+                else if  (errData === 'docx')
+                    config.msg = _t.errorInconsistentExtDocx.replace('%1', docExt);
+                else if  (errData === 'xlsx')
+                    config.msg = _t.errorInconsistentExtXlsx.replace('%1', docExt);
+                else if  (errData === 'pptx')
+                    config.msg = _t.errorInconsistentExtPptx.replace('%1', docExt);
+                else
+                    config.msg = _t.errorInconsistentExt;
+                break;
+
             default:
                 config.msg = _t.errorDefaultMessage.replace('%1', id);
                 break;
diff --git a/apps/presentationeditor/embed/js/ApplicationController.js b/apps/presentationeditor/embed/js/ApplicationController.js
index 1ef42abb2..28e6fe5c3 100644
--- a/apps/presentationeditor/embed/js/ApplicationController.js
+++ b/apps/presentationeditor/embed/js/ApplicationController.js
@@ -614,6 +614,19 @@ PE.ApplicationController = new(function(){
                 message = me.errorTokenExpire;
                 break;
 
+            case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                if (errData === 'pdf')
+                    message = me.errorInconsistentExtPdf.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'docx')
+                    message = me.errorInconsistentExtDocx.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'xlsx')
+                    message = me.errorInconsistentExtXlsx.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'pptx')
+                    message = me.errorInconsistentExtPptx.replace('%1', docConfig.fileType || '');
+                else
+                    message = me.errorInconsistentExt;
+                break;
+
             default:
                 message = me.errorDefaultMessage.replace('%1', id);
                 break;
@@ -782,6 +795,11 @@ PE.ApplicationController = new(function(){
         errorForceSave: "An error occurred while saving the file. Please use the 'Download as' option to save the file to your computer hard drive or try again later.",
         errorLoadingFont: 'Fonts are not loaded.<br>Please contact your Document Server administrator.',
         errorTokenExpire: 'The document security token has expired.<br>Please contact your Document Server administrator.',
-        openErrorText: 'An error has occurred while opening the file'
+        openErrorText: 'An error has occurred while opening the file',
+        errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+        errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
     }
 })();
diff --git a/apps/presentationeditor/embed/locale/en.json b/apps/presentationeditor/embed/locale/en.json
index a53e47c3b..637905683 100644
--- a/apps/presentationeditor/embed/locale/en.json
+++ b/apps/presentationeditor/embed/locale/en.json
@@ -19,6 +19,11 @@
   "PE.ApplicationController.errorTokenExpire": "The document security token has expired.<br>Please contact your Document Server administrator.",
   "PE.ApplicationController.errorUpdateVersionOnDisconnect": "Connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.",
   "PE.ApplicationController.errorUserDrop": "The file cannot be accessed right now.",
+  "PE.ApplicationController.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "PE.ApplicationController.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "PE.ApplicationController.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "PE.ApplicationController.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "PE.ApplicationController.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "PE.ApplicationController.notcriticalErrorTitle": "Warning",
   "PE.ApplicationController.openErrorText": "An error has occurred while opening the file.",
   "PE.ApplicationController.scriptLoadError": "The connection is too slow, some of the components could not be loaded. Please reload the page.",
diff --git a/apps/presentationeditor/main/app/controller/DocumentHolder.js b/apps/presentationeditor/main/app/controller/DocumentHolder.js
index 2bb85ec97..9344c8a9d 100644
--- a/apps/presentationeditor/main/app/controller/DocumentHolder.js
+++ b/apps/presentationeditor/main/app/controller/DocumentHolder.js
@@ -2282,7 +2282,7 @@ define([
                         store: group.get('groupStore'),
                         scrollAlwaysVisible: true,
                         showLast: false,
-                        restoreHeight: group.get('groupHeight') ? parseInt(group.get('groupHeight')) : true,
+                        restoreHeight: 450,
                         itemTemplate: _.template(
                             '<div class="item-equation" style="" >' +
                             '<div class="equation-icon" style="background-position:<%= posX %>px <%= posY %>px;width:<%= width %>px;height:<%= height %>px;" id="<%= id %>"></div>' +
@@ -2296,6 +2296,12 @@ define([
                     });
                     menu.off('show:before', onShowBefore);
                 };
+                var bringForward = function (menu) {
+                    eqContainer.addClass('has-open-menu');
+                };
+                var sendBackward = function (menu) {
+                    eqContainer.removeClass('has-open-menu');
+                };
                 for (var i = 0; i < equationsStore.length; ++i) {
                     var equationGroup = equationsStore.at(i);
                     var btn = new Common.UI.Button({
@@ -2315,6 +2321,8 @@ define([
                         })
                     });
                     btn.menu.on('show:before', onShowBefore);
+                    btn.menu.on('show:before', bringForward);
+                    btn.menu.on('hide:after', sendBackward);
                     me.equationBtns.push(btn);
                 }
 
@@ -2341,8 +2349,14 @@ define([
             if (showPoint[1]<0) {
                 showPoint[1] = bounds[3] + 10;
             }
-            eqContainer.css({left: showPoint[0], top : Math.min(me._Height - eqContainer.outerHeight(), Math.max(0, showPoint[1]))});
-            // menu.menuAlign = validation ? 'tr-br' : 'tl-bl';
+            showPoint[1] = Math.min(me._Height - eqContainer.outerHeight(), Math.max(0, showPoint[1]));
+            eqContainer.css({left: showPoint[0], top : showPoint[1]});
+
+            var menuAlign = (me._Height - showPoint[1] - eqContainer.outerHeight() < 220) ? 'bl-tl' : 'tl-bl';
+            me.equationBtns.forEach(function(item){
+                item && (item.menu.menuAlign = menuAlign);
+            });
+            me.equationSettingsBtn.menu.menuAlign = menuAlign;
             if (eqContainer.is(':visible')) {
                 if (me.equationSettingsBtn.menu.isVisible()) {
                     me.equationSettingsBtn.menu.options.initMenu();
diff --git a/apps/presentationeditor/main/app/controller/Main.js b/apps/presentationeditor/main/app/controller/Main.js
index f27983fa7..16fc578f3 100644
--- a/apps/presentationeditor/main/app/controller/Main.js
+++ b/apps/presentationeditor/main/app/controller/Main.js
@@ -339,6 +339,19 @@ define([
                     Common.Utils.InternalSettings.set("guest-username", value);
                     Common.Utils.InternalSettings.set("save-guest-username", !!value);
                 }
+                if (this.appOptions.customization.font) {
+                    if (this.appOptions.customization.font.family && typeof this.appOptions.customization.font.family === 'string') {
+                        var arr = this.appOptions.customization.font.family.split(',');
+                        for (var i=0; i<arr.length; i++) {
+                            var item = arr[i].trim();
+                            if (item && (/[\s0-9\.]/).test(item)) {
+                                arr[i] = "'" + item + "'";
+                            }
+                        }
+                        document.documentElement.style.setProperty("--font-family-base-custom", arr.join(','));
+                    }
+                }
+
                 this.editorConfig.user          =
                 this.appOptions.user            = Common.Utils.fillUserInfo(data.config.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous,
                                                   Common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
@@ -1040,7 +1053,8 @@ define([
                         });
                     }
                 } else if (!this.appOptions.isDesktopApp && !this.appOptions.canBrandingExt &&
-                    this.editorConfig && this.editorConfig.customization && (this.editorConfig.customization.loaderName || this.editorConfig.customization.loaderLogo)) {
+                    this.editorConfig && this.editorConfig.customization && (this.editorConfig.customization.loaderName || this.editorConfig.customization.loaderLogo ||
+                                                                             this.editorConfig.customization.font && this.editorConfig.customization.font.family)) {
                     Common.UI.warning({
                         title: this.textPaidFeature,
                         msg  : this.textCustomLoader,
@@ -1579,6 +1593,20 @@ define([
                         config.msg = this.errorDirectUrl;
                         break;
 
+                    case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                        config.maxwidth = 600;
+                        if (errData === 'pdf')
+                            config.msg = this.errorInconsistentExtPdf.replace('%1', this.document.fileType || '');
+                        else if  (errData === 'docx')
+                            config.msg = this.errorInconsistentExtDocx.replace('%1', this.document.fileType || '');
+                        else if  (errData === 'xlsx')
+                            config.msg = this.errorInconsistentExtXlsx.replace('%1', this.document.fileType || '');
+                        else if  (errData === 'pptx')
+                            config.msg = this.errorInconsistentExtPptx.replace('%1', this.document.fileType || '');
+                        else
+                            config.msg = this.errorInconsistentExt;
+                        break;
+
                     default:
                         config.msg = (typeof id == 'string') ? id : this.errorDefaultMessage.replace('%1', id);
                         break;
@@ -3017,7 +3045,12 @@ define([
             textRememberMacros: 'Remember my choice for all macros',
             confirmMaxChangesSize: 'The size of actions exceeds the limitation set for your server.<br>Press "Undo" to cancel your last action or press "Continue" to keep action locally (you need to download the file or copy its content to make sure nothing is lost).',
             textUndo: 'Undo',
-            textContinue: 'Continue'
+            textContinue: 'Continue',
+            errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+            errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
         }
     })(), PE.Controllers.Main || {}))
 });
diff --git a/apps/presentationeditor/main/app/view/FileMenu.js b/apps/presentationeditor/main/app/view/FileMenu.js
index eda4f9afa..3f5a3d15b 100644
--- a/apps/presentationeditor/main/app/view/FileMenu.js
+++ b/apps/presentationeditor/main/app/view/FileMenu.js
@@ -72,7 +72,7 @@ define([
                         if (item.options.action === 'help') {
                             if ( panel.noHelpContents === true && navigator.onLine ) {
                                 this.fireEvent('item:click', [this, 'external-help', true]);
-                                window.open(panel.urlHelpCenter, '_blank');
+                                !!panel.urlHelpCenter && window.open(panel.urlHelpCenter, '_blank');
                                 return;
                             }
                         }
diff --git a/apps/presentationeditor/main/app/view/FileMenuPanels.js b/apps/presentationeditor/main/app/view/FileMenuPanels.js
index 2e0a5272d..7e0e0ba5b 100644
--- a/apps/presentationeditor/main/app/view/FileMenuPanels.js
+++ b/apps/presentationeditor/main/app/view/FileMenuPanels.js
@@ -1512,7 +1512,14 @@ define([
             this.menu = options.menu;
             this.urlPref = 'resources/help/{{DEFAULT_LANG}}/';
             this.openUrl = null;
-            this.urlHelpCenter = '{{HELP_CENTER_WEB_PE}}';
+
+            if ( !Common.Utils.isIE ) {
+                if ( /^https?:\/\//.test('{{HELP_CENTER_WEB_PE}}') ) {
+                    const _url_obj = new URL('{{HELP_CENTER_WEB_PE}}');
+                    _url_obj.searchParams.set('lang', Common.Locale.getCurrentLanguage());
+                    this.urlHelpCenter = _url_obj.toString();
+                }
+            }
 
             this.en_data = [
                 {"src": "ProgramInterface/ProgramInterface.htm", "name": "Introducing Presentation Editor user interface", "headername": "Program Interface"},
diff --git a/apps/presentationeditor/main/locale/en.json b/apps/presentationeditor/main/locale/en.json
index 9bc2db95f..300769ae5 100644
--- a/apps/presentationeditor/main/locale/en.json
+++ b/apps/presentationeditor/main/locale/en.json
@@ -837,6 +837,11 @@
   "PE.Controllers.Main.errorUserDrop": "The file cannot be accessed right now.",
   "PE.Controllers.Main.errorUsersExceed": "The number of users allowed by the pricing plan was exceeded",
   "PE.Controllers.Main.errorViewerDisconnect": "Connection is lost. You can still view the document,<br>but will not be able to download or print it until the connection is restored and page is reloaded.",
+  "PE.Controllers.Main.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "PE.Controllers.Main.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "PE.Controllers.Main.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "PE.Controllers.Main.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "PE.Controllers.Main.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "PE.Controllers.Main.leavePageText": "You have unsaved changes in this presentation. Click \"Stay on This Page\", then \"Save\" to save them. Click \"Leave This Page\" to discard all the unsaved changes.",
   "PE.Controllers.Main.leavePageTextOnClose": "All unsaved changes in this presentation will be lost.<br> Click \"Cancel\" then \"Save\" to save them. Click \"OK\" to discard all the unsaved changes.",
   "PE.Controllers.Main.loadFontsTextText": "Loading data...",
diff --git a/apps/presentationeditor/main/resources/less/toolbar.less b/apps/presentationeditor/main/resources/less/toolbar.less
index 80129babc..c601d2feb 100644
--- a/apps/presentationeditor/main/resources/less/toolbar.less
+++ b/apps/presentationeditor/main/resources/less/toolbar.less
@@ -83,7 +83,7 @@
     border-radius: 0;
     padding: 3px 10px;
     color: #fff;
-    font: 11px arial;
+    .font-size-normal();
     white-space: nowrap;
     letter-spacing: 1px;
     overflow: hidden;
@@ -111,6 +111,9 @@
     .separator {
         height: 20px;
     }
+    &.has-open-menu {
+        z-index: @zindex-navbar + 1;
+    }
 }
 
 .item-theme {
diff --git a/apps/presentationeditor/mobile/locale/az.json b/apps/presentationeditor/mobile/locale/az.json
index afce4f7d5..ccb88aad9 100644
--- a/apps/presentationeditor/mobile/locale/az.json
+++ b/apps/presentationeditor/mobile/locale/az.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Naməlum təsvir formatı.",
     "uploadImageFileCountMessage": "Heç bir təsvir yüklənməyib.",
     "uploadImageSizeMessage": "Təsvir çox böyükdür. Maksimum ölçü 25 MB-dır.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Məlumat yüklənir...",
diff --git a/apps/presentationeditor/mobile/locale/be.json b/apps/presentationeditor/mobile/locale/be.json
index 4597cb3e2..88440d683 100644
--- a/apps/presentationeditor/mobile/locale/be.json
+++ b/apps/presentationeditor/mobile/locale/be.json
@@ -172,7 +172,12 @@
     "openErrorText": "An error has occurred while opening the file",
     "saveErrorText": "An error has occurred while saving the file",
     "scriptLoadError": "The connection is too slow, some of the components could not be loaded. Please, reload the page.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Загрузка даных…",
diff --git a/apps/presentationeditor/mobile/locale/bg.json b/apps/presentationeditor/mobile/locale/bg.json
index 867375190..10040ffd3 100644
--- a/apps/presentationeditor/mobile/locale/bg.json
+++ b/apps/presentationeditor/mobile/locale/bg.json
@@ -172,7 +172,12 @@
     "uploadImageFileCountMessage": "No images uploaded.",
     "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
     "errorLoadingFont": "Fonts are not loaded.<br>Please contact your Document Server administrator.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/ca.json b/apps/presentationeditor/mobile/locale/ca.json
index 6b474b4c1..76b44414f 100644
--- a/apps/presentationeditor/mobile/locale/ca.json
+++ b/apps/presentationeditor/mobile/locale/ca.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Error desconegut.",
     "uploadImageExtMessage": "Format d'imatge desconegut.",
     "uploadImageFileCountMessage": "No s'ha carregat cap imatge.",
-    "uploadImageSizeMessage": "La imatge és massa gran. La mida màxima és de 25 MB."
+    "uploadImageSizeMessage": "La imatge és massa gran. La mida màxima és de 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "S'estant carregant les dades...",
diff --git a/apps/presentationeditor/mobile/locale/cs.json b/apps/presentationeditor/mobile/locale/cs.json
index 526f44a3d..073ece1e6 100644
--- a/apps/presentationeditor/mobile/locale/cs.json
+++ b/apps/presentationeditor/mobile/locale/cs.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Neznámý formát obrázku.",
     "uploadImageFileCountMessage": "Žádné obrázky nenahrány.",
     "uploadImageSizeMessage": "Obrázek je příliš velký. Maximální velikost je 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Načítání dat...",
diff --git a/apps/presentationeditor/mobile/locale/de.json b/apps/presentationeditor/mobile/locale/de.json
index 2c8d25238..c9e411b28 100644
--- a/apps/presentationeditor/mobile/locale/de.json
+++ b/apps/presentationeditor/mobile/locale/de.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Unbekanntes Bildformat.",
     "uploadImageFileCountMessage": "Keine Bilder hochgeladen.",
     "uploadImageSizeMessage": "Die maximal zulässige Bildgröße von 25 MB ist überschritten.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Daten werden geladen...",
diff --git a/apps/presentationeditor/mobile/locale/el.json b/apps/presentationeditor/mobile/locale/el.json
index bdca81ff4..a5ffcc729 100644
--- a/apps/presentationeditor/mobile/locale/el.json
+++ b/apps/presentationeditor/mobile/locale/el.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Άγνωστη μορφή εικόνας.",
     "uploadImageFileCountMessage": "Δεν μεταφορτώθηκαν εικόνες.",
     "uploadImageSizeMessage": "Η εικόνα είναι πολύ μεγάλη. Το μέγιστο μέγεθος είναι 25MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Φόρτωση δεδομένων...",
diff --git a/apps/presentationeditor/mobile/locale/en.json b/apps/presentationeditor/mobile/locale/en.json
index 4a656be44..3d4bd0c2a 100644
--- a/apps/presentationeditor/mobile/locale/en.json
+++ b/apps/presentationeditor/mobile/locale/en.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/es.json b/apps/presentationeditor/mobile/locale/es.json
index 42ff565b4..a02241f55 100644
--- a/apps/presentationeditor/mobile/locale/es.json
+++ b/apps/presentationeditor/mobile/locale/es.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Formato de imagen desconocido.",
     "uploadImageFileCountMessage": "No hay imágenes subidas.",
     "uploadImageSizeMessage": "La imagen es demasiado grande. El tamaño máximo es de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Cargando datos...",
diff --git a/apps/presentationeditor/mobile/locale/eu.json b/apps/presentationeditor/mobile/locale/eu.json
index c7062f4c9..b404d8457 100644
--- a/apps/presentationeditor/mobile/locale/eu.json
+++ b/apps/presentationeditor/mobile/locale/eu.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Irudi formatu ezezaguna.",
     "uploadImageFileCountMessage": "Ez da irudirik kargatu.",
     "uploadImageSizeMessage": "Irudia handiegia da. Gehienezko tamaina 25 MB da.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Datuak kargatzen...",
diff --git a/apps/presentationeditor/mobile/locale/fr.json b/apps/presentationeditor/mobile/locale/fr.json
index f9c0f4e9f..d9aa77b70 100644
--- a/apps/presentationeditor/mobile/locale/fr.json
+++ b/apps/presentationeditor/mobile/locale/fr.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Erreur inconnue.",
     "uploadImageExtMessage": "Format d'image inconnu.",
     "uploadImageFileCountMessage": "Aucune image chargée.",
-    "uploadImageSizeMessage": "L'image est trop grande. La taille limite est de 25 Mo."
+    "uploadImageSizeMessage": "L'image est trop grande. La taille limite est de 25 Mo.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Chargement des données en cours...",
diff --git a/apps/presentationeditor/mobile/locale/gl.json b/apps/presentationeditor/mobile/locale/gl.json
index 8ce1357ea..c2d82dfdd 100644
--- a/apps/presentationeditor/mobile/locale/gl.json
+++ b/apps/presentationeditor/mobile/locale/gl.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Formato de imaxe descoñecido.",
     "uploadImageFileCountMessage": "Non hai imaxes subidas.",
     "uploadImageSizeMessage": "A imaxe é demasiado grande. O tamaño máximo é de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Cargando datos...",
diff --git a/apps/presentationeditor/mobile/locale/hu.json b/apps/presentationeditor/mobile/locale/hu.json
index d30999650..dc0d426c7 100644
--- a/apps/presentationeditor/mobile/locale/hu.json
+++ b/apps/presentationeditor/mobile/locale/hu.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Ismeretlen hiba.",
     "uploadImageExtMessage": "Ismeretlen képformátum.",
     "uploadImageFileCountMessage": "Nincs kép feltöltve.",
-    "uploadImageSizeMessage": "A kép túl nagy. A maximális méret 25 MB."
+    "uploadImageSizeMessage": "A kép túl nagy. A maximális méret 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Adatok betöltése...",
diff --git a/apps/presentationeditor/mobile/locale/hy.json b/apps/presentationeditor/mobile/locale/hy.json
index 780ac46ad..64aeef4f0 100644
--- a/apps/presentationeditor/mobile/locale/hy.json
+++ b/apps/presentationeditor/mobile/locale/hy.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Անհայտ սխալ։",
     "uploadImageExtMessage": "Նկարի անհայտ ձևաչափ։",
     "uploadImageFileCountMessage": "Ոչ մի նկար չի բեռնվել։",
-    "uploadImageSizeMessage": "Պատկերը չափազանց մեծ է:Առավելագույն չափը 25 ՄԲ է:"
+    "uploadImageSizeMessage": "Պատկերը չափազանց մեծ է:Առավելագույն չափը 25 ՄԲ է:",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Տվյալների բեռնում...",
diff --git a/apps/presentationeditor/mobile/locale/id.json b/apps/presentationeditor/mobile/locale/id.json
index c430c6d47..83a77fede 100644
--- a/apps/presentationeditor/mobile/locale/id.json
+++ b/apps/presentationeditor/mobile/locale/id.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Kesalahan tidak diketahui.",
     "uploadImageExtMessage": "Format gambar tidak dikenal.",
     "uploadImageFileCountMessage": "Tidak ada gambar yang diunggah.",
-    "uploadImageSizeMessage": "Melebihi ukuran maksimal file. Ukuran maksimum adalah 25 MB."
+    "uploadImageSizeMessage": "Melebihi ukuran maksimal file. Ukuran maksimum adalah 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Memuat data...",
diff --git a/apps/presentationeditor/mobile/locale/it.json b/apps/presentationeditor/mobile/locale/it.json
index f36d4e0c8..bcbdc21fb 100644
--- a/apps/presentationeditor/mobile/locale/it.json
+++ b/apps/presentationeditor/mobile/locale/it.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Formato d'immagine sconosciuto.",
     "uploadImageFileCountMessage": "Nessuna immagine caricata.",
     "uploadImageSizeMessage": "L'immagine è troppo grande. La dimensione massima è 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Caricamento di dati...",
diff --git a/apps/presentationeditor/mobile/locale/ja.json b/apps/presentationeditor/mobile/locale/ja.json
index a67b4b334..0a03eced5 100644
--- a/apps/presentationeditor/mobile/locale/ja.json
+++ b/apps/presentationeditor/mobile/locale/ja.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "不明なエラー",
     "uploadImageExtMessage": "不明なイメージの形式",
     "uploadImageFileCountMessage": "アップロードしたイメージがない",
-    "uploadImageSizeMessage": "イメージのサイズの上限が超えさせました。サイズの上限が２５MB。"
+    "uploadImageSizeMessage": "イメージのサイズの上限が超えさせました。サイズの上限が２５MB。",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "データの読み込み中...",
diff --git a/apps/presentationeditor/mobile/locale/ko.json b/apps/presentationeditor/mobile/locale/ko.json
index f80181703..69687857f 100644
--- a/apps/presentationeditor/mobile/locale/ko.json
+++ b/apps/presentationeditor/mobile/locale/ko.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "알 수없는 이미지 형식입니다.",
     "uploadImageFileCountMessage": "이미지가 업로드되지 않았습니다.",
     "uploadImageSizeMessage": "이미지 크기 제한을 초과했습니다.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "데이터로드 중 ...",
diff --git a/apps/presentationeditor/mobile/locale/lo.json b/apps/presentationeditor/mobile/locale/lo.json
index b5ce61d0c..0ea038f59 100644
--- a/apps/presentationeditor/mobile/locale/lo.json
+++ b/apps/presentationeditor/mobile/locale/lo.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "ບໍ່ຮູ້ສາເຫດຂໍ້ຜິດຜາດຮູບແບບຂອງຮູບ",
     "uploadImageFileCountMessage": "ບໍ່ມີຮູບພາບອັບໂຫລດ",
     "uploadImageSizeMessage": "ຮູບພາບໃຫຍ່ເກີນໄປ. ຂະຫນາດສູງສຸດແມ່ນ 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "ກຳລັງດາວໂຫຼດຂໍ້ມູນ...",
diff --git a/apps/presentationeditor/mobile/locale/lv.json b/apps/presentationeditor/mobile/locale/lv.json
index 867375190..10040ffd3 100644
--- a/apps/presentationeditor/mobile/locale/lv.json
+++ b/apps/presentationeditor/mobile/locale/lv.json
@@ -172,7 +172,12 @@
     "uploadImageFileCountMessage": "No images uploaded.",
     "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
     "errorLoadingFont": "Fonts are not loaded.<br>Please contact your Document Server administrator.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/ms.json b/apps/presentationeditor/mobile/locale/ms.json
index 5bbfbbb95..355fc0ebf 100644
--- a/apps/presentationeditor/mobile/locale/ms.json
+++ b/apps/presentationeditor/mobile/locale/ms.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Format imej yang tidak diketahui.",
     "uploadImageFileCountMessage": "Tiada Imej dimuat naik.",
     "uploadImageSizeMessage": "Imej terlalu besar. Saiz maksimum adalah 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Data dimuatkan…",
diff --git a/apps/presentationeditor/mobile/locale/nb.json b/apps/presentationeditor/mobile/locale/nb.json
index 867375190..10040ffd3 100644
--- a/apps/presentationeditor/mobile/locale/nb.json
+++ b/apps/presentationeditor/mobile/locale/nb.json
@@ -172,7 +172,12 @@
     "uploadImageFileCountMessage": "No images uploaded.",
     "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
     "errorLoadingFont": "Fonts are not loaded.<br>Please contact your Document Server administrator.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/nl.json b/apps/presentationeditor/mobile/locale/nl.json
index 6b965d672..479b208bc 100644
--- a/apps/presentationeditor/mobile/locale/nl.json
+++ b/apps/presentationeditor/mobile/locale/nl.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Onbekende afbeeldingsindeling.",
     "uploadImageFileCountMessage": "Geen afbeeldingen geüpload.",
     "uploadImageSizeMessage": "De afbeelding is te groot. De maximale grootte is 25MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Gegevens worden geladen...",
diff --git a/apps/presentationeditor/mobile/locale/pl.json b/apps/presentationeditor/mobile/locale/pl.json
index 867375190..10040ffd3 100644
--- a/apps/presentationeditor/mobile/locale/pl.json
+++ b/apps/presentationeditor/mobile/locale/pl.json
@@ -172,7 +172,12 @@
     "uploadImageFileCountMessage": "No images uploaded.",
     "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
     "errorLoadingFont": "Fonts are not loaded.<br>Please contact your Document Server administrator.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/pt-pt.json b/apps/presentationeditor/mobile/locale/pt-pt.json
index e5d88752c..afe709021 100644
--- a/apps/presentationeditor/mobile/locale/pt-pt.json
+++ b/apps/presentationeditor/mobile/locale/pt-pt.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Erro desconhecido.",
     "uploadImageExtMessage": "Formato de imagem desconhecido.",
     "uploadImageFileCountMessage": "Nenhuma imagem foi carregada.",
-    "uploadImageSizeMessage": "A imagem é muito grande. O tamanho máximo é de 25 MB."
+    "uploadImageSizeMessage": "A imagem é muito grande. O tamanho máximo é de 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "A carregar dados...",
diff --git a/apps/presentationeditor/mobile/locale/pt.json b/apps/presentationeditor/mobile/locale/pt.json
index 39153e306..c3be241f2 100644
--- a/apps/presentationeditor/mobile/locale/pt.json
+++ b/apps/presentationeditor/mobile/locale/pt.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Erro desconhecido.",
     "uploadImageExtMessage": "Formato de imagem desconhecido.",
     "uploadImageFileCountMessage": "Sem imagens carregadas.",
-    "uploadImageSizeMessage": "Tamanho limite máximo da imagem excedido. O tamanho máximo é de 25 MB."
+    "uploadImageSizeMessage": "Tamanho limite máximo da imagem excedido. O tamanho máximo é de 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Carregando dados...",
diff --git a/apps/presentationeditor/mobile/locale/ro.json b/apps/presentationeditor/mobile/locale/ro.json
index fd1824bd8..f9aaf35f0 100644
--- a/apps/presentationeditor/mobile/locale/ro.json
+++ b/apps/presentationeditor/mobile/locale/ro.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Format de imagine nerecunoscut.",
     "uploadImageFileCountMessage": "Nicio imagine nu a fost încărcată.",
     "uploadImageSizeMessage": "Imaginea este prea mare. Limita de dimensiune este de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Încărcarea datelor...",
diff --git a/apps/presentationeditor/mobile/locale/ru.json b/apps/presentationeditor/mobile/locale/ru.json
index afc5ed7b9..3ef7cbbcd 100644
--- a/apps/presentationeditor/mobile/locale/ru.json
+++ b/apps/presentationeditor/mobile/locale/ru.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Неизвестная ошибка.",
     "uploadImageExtMessage": "Неизвестный формат рисунка.",
     "uploadImageFileCountMessage": "Ни одного рисунка не загружено.",
-    "uploadImageSizeMessage": "Слишком большой рисунок. Максимальный размер - 25 MB."
+    "uploadImageSizeMessage": "Слишком большой рисунок. Максимальный размер - 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Загрузка данных...",
diff --git a/apps/presentationeditor/mobile/locale/sk.json b/apps/presentationeditor/mobile/locale/sk.json
index d84fc5027..c48b6d9d9 100644
--- a/apps/presentationeditor/mobile/locale/sk.json
+++ b/apps/presentationeditor/mobile/locale/sk.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Neznámy formát obrázka.",
     "uploadImageFileCountMessage": "Neboli načítané žiadne obrázky.",
     "uploadImageSizeMessage": "Obrázok je príliš veľký. Maximálna veľkosť je 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Načítavanie dát...",
diff --git a/apps/presentationeditor/mobile/locale/sl.json b/apps/presentationeditor/mobile/locale/sl.json
index 9a1578208..260234bc3 100644
--- a/apps/presentationeditor/mobile/locale/sl.json
+++ b/apps/presentationeditor/mobile/locale/sl.json
@@ -456,7 +456,12 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/tr.json b/apps/presentationeditor/mobile/locale/tr.json
index 79b77db71..fa4b20e37 100644
--- a/apps/presentationeditor/mobile/locale/tr.json
+++ b/apps/presentationeditor/mobile/locale/tr.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "Bilinmeyen resim formatı.",
     "uploadImageFileCountMessage": "Resim yüklenmedi.",
     "uploadImageSizeMessage": "Görüntü çok büyük. Maksimum boyut 25 MB'dir.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Veri yükleniyor...",
diff --git a/apps/presentationeditor/mobile/locale/uk.json b/apps/presentationeditor/mobile/locale/uk.json
index 35952154a..bb8a43558 100644
--- a/apps/presentationeditor/mobile/locale/uk.json
+++ b/apps/presentationeditor/mobile/locale/uk.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "View": {
     "Add": {
diff --git a/apps/presentationeditor/mobile/locale/vi.json b/apps/presentationeditor/mobile/locale/vi.json
index 867375190..10040ffd3 100644
--- a/apps/presentationeditor/mobile/locale/vi.json
+++ b/apps/presentationeditor/mobile/locale/vi.json
@@ -172,7 +172,12 @@
     "uploadImageFileCountMessage": "No images uploaded.",
     "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
     "errorLoadingFont": "Fonts are not loaded.<br>Please contact your Document Server administrator.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/presentationeditor/mobile/locale/zh-tw.json b/apps/presentationeditor/mobile/locale/zh-tw.json
index 079b9d7ad..6c2396f8d 100644
--- a/apps/presentationeditor/mobile/locale/zh-tw.json
+++ b/apps/presentationeditor/mobile/locale/zh-tw.json
@@ -172,7 +172,12 @@
     "uploadImageExtMessage": "圖片格式未知。",
     "uploadImageFileCountMessage": "沒有上傳圖片。",
     "uploadImageSizeMessage": "圖像超出最大大小限制。最大大小為25MB。",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "加載數據中...",
diff --git a/apps/presentationeditor/mobile/locale/zh.json b/apps/presentationeditor/mobile/locale/zh.json
index a30c3734b..a79ed3af9 100644
--- a/apps/presentationeditor/mobile/locale/zh.json
+++ b/apps/presentationeditor/mobile/locale/zh.json
@@ -172,7 +172,12 @@
     "unknownErrorText": "未知错误。",
     "uploadImageExtMessage": "未知图像格式。",
     "uploadImageFileCountMessage": "没有图片上传",
-    "uploadImageSizeMessage": "超过了最大图片大小"
+    "uploadImageSizeMessage": "超过了最大图片大小",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "数据加载中…",
diff --git a/apps/presentationeditor/mobile/src/controller/Error.jsx b/apps/presentationeditor/mobile/src/controller/Error.jsx
index 8ae921b20..b32057f38 100644
--- a/apps/presentationeditor/mobile/src/controller/Error.jsx
+++ b/apps/presentationeditor/mobile/src/controller/Error.jsx
@@ -3,7 +3,7 @@ import { inject } from 'mobx-react';
 import { f7 } from 'framework7-react';
 import { useTranslation } from 'react-i18next';
 
-const ErrorController = inject('storeAppOptions')(({storeAppOptions, LoadingDocument}) => {
+const ErrorController = inject('storeAppOptions','storePresentationInfo')(({storeAppOptions, storePresentationInfo, LoadingDocument}) => {
     const { t } = useTranslation();
     const _t = t("Error", { returnObjects: true });
 
@@ -177,6 +177,20 @@ const ErrorController = inject('storeAppOptions')(({storeAppOptions, LoadingDocu
                 config.msg = _t.errorDirectUrl;
                 break;
 
+            case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                let docExt = storePresentationInfo.dataDoc ? storePresentationInfo.dataDoc.fileType || '' : '';
+                if (errData === 'pdf')
+                    config.msg = _t.errorInconsistentExtPdf.replace('%1', docExt);
+                else if  (errData === 'docx')
+                    config.msg = _t.errorInconsistentExtDocx.replace('%1', docExt);
+                else if  (errData === 'xlsx')
+                    config.msg = _t.errorInconsistentExtXlsx.replace('%1', docExt);
+                else if  (errData === 'pptx')
+                    config.msg = _t.errorInconsistentExtPptx.replace('%1', docExt);
+                else
+                    config.msg = _t.errorInconsistentExt;
+                break;
+
             default:
                 config.msg = _t.errorDefaultMessage.replace('%1', id);
                 break;
diff --git a/apps/spreadsheeteditor/embed/js/ApplicationController.js b/apps/spreadsheeteditor/embed/js/ApplicationController.js
index a479d3b58..474a9220e 100644
--- a/apps/spreadsheeteditor/embed/js/ApplicationController.js
+++ b/apps/spreadsheeteditor/embed/js/ApplicationController.js
@@ -526,6 +526,19 @@ SSE.ApplicationController = new(function(){
                 message = me.errorTokenExpire;
                 break;
 
+            case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                if (errData === 'pdf')
+                    message = me.errorInconsistentExtPdf.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'docx')
+                    message = me.errorInconsistentExtDocx.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'xlsx')
+                    message = me.errorInconsistentExtXlsx.replace('%1', docConfig.fileType || '');
+                else if  (errData === 'pptx')
+                    message = me.errorInconsistentExtPptx.replace('%1', docConfig.fileType || '');
+                else
+                    message = me.errorInconsistentExt;
+                break;
+
             default:
                 message = me.errorDefaultMessage.replace('%1', id);
                 break;
@@ -732,6 +745,11 @@ SSE.ApplicationController = new(function(){
         errorForceSave: "An error occurred while saving the file. Please use the 'Download as' option to save the file to your computer hard drive or try again later.",
         errorLoadingFont: 'Fonts are not loaded.<br>Please contact your Document Server administrator.',
         errorTokenExpire: 'The document security token has expired.<br>Please contact your Document Server administrator.',
-        openErrorText: 'An error has occurred while opening the file'
+        openErrorText: 'An error has occurred while opening the file',
+        errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+        errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+        errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
     }
 })();
\ No newline at end of file
diff --git a/apps/spreadsheeteditor/embed/locale/en.json b/apps/spreadsheeteditor/embed/locale/en.json
index 1a99fee2a..91237e485 100644
--- a/apps/spreadsheeteditor/embed/locale/en.json
+++ b/apps/spreadsheeteditor/embed/locale/en.json
@@ -19,6 +19,11 @@
   "SSE.ApplicationController.errorTokenExpire": "The document security token has expired.<br>Please contact your Document Server administrator.",
   "SSE.ApplicationController.errorUpdateVersionOnDisconnect": "Connection has been restored, and the file version has been changed.<br>Before you can continue working, you need to download the file or copy its content to make sure nothing is lost, and then reload this page.",
   "SSE.ApplicationController.errorUserDrop": "The file cannot be accessed right now.",
+  "SSE.ApplicationController.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "SSE.ApplicationController.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "SSE.ApplicationController.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "SSE.ApplicationController.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "SSE.ApplicationController.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "SSE.ApplicationController.notcriticalErrorTitle": "Warning",
   "SSE.ApplicationController.openErrorText": "An error has occurred while opening the file.",
   "SSE.ApplicationController.scriptLoadError": "The connection is too slow, some of the components could not be loaded. Please reload the page.",
diff --git a/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js b/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js
index c895ba0f8..6364a2ca4 100644
--- a/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js
+++ b/apps/spreadsheeteditor/main/app/controller/DocumentHolder.js
@@ -4348,7 +4348,7 @@ define([
                         store: group.get('groupStore'),
                         scrollAlwaysVisible: true,
                         showLast: false,
-                        restoreHeight: group.get('groupHeight') ? parseInt(group.get('groupHeight')) : true,
+                        restoreHeight: 450,
                         itemTemplate: _.template(
                             '<div class="item-equation" style="" >' +
                             '<div class="equation-icon" style="background-position:<%= posX %>px <%= posY %>px;width:<%= width %>px;height:<%= height %>px;" id="<%= id %>"></div>' +
@@ -4362,6 +4362,12 @@ define([
                     });
                     menu.off('show:before', onShowBefore);
                 };
+                var bringForward = function (menu) {
+                    eqContainer.addClass('has-open-menu');
+                };
+                var sendBackward = function (menu) {
+                    eqContainer.removeClass('has-open-menu');
+                };
                 for (var i = 0; i < equationsStore.length; ++i) {
                     var equationGroup = equationsStore.at(i);
                     var btn = new Common.UI.Button({
@@ -4381,6 +4387,8 @@ define([
                         })
                     });
                     btn.menu.on('show:before', onShowBefore);
+                    btn.menu.on('show:before', bringForward);
+                    btn.menu.on('hide:after', sendBackward);
                     me.equationBtns.push(btn);
                 }
 
@@ -4410,8 +4418,14 @@ define([
             if (showPoint[1]<0) {
                 showPoint[1] = bounds[3] + 10;
             }
-            eqContainer.css({left: showPoint[0], top : Math.min(me.tooltips.coauth.apiHeight - eqContainer.outerHeight(), Math.max(0, showPoint[1]))});
-            // menu.menuAlign = validation ? 'tr-br' : 'tl-bl';
+            showPoint[1] = Math.min(me.tooltips.coauth.apiHeight - eqContainer.outerHeight(), Math.max(0, showPoint[1]));
+            eqContainer.css({left: showPoint[0], top : showPoint[1]});
+
+            var menuAlign = (me.tooltips.coauth.apiHeight - showPoint[1] - eqContainer.outerHeight() < 220) ? 'bl-tl' : 'tl-bl';
+            me.equationBtns.forEach(function(item){
+                item && (item.menu.menuAlign = menuAlign);
+            });
+            me.equationSettingsBtn.menu.menuAlign = menuAlign;
             if (eqContainer.is(':visible')) {
                 if (me.equationSettingsBtn.menu.isVisible()) {
                     me.equationSettingsBtn.menu.options.initMenu();
diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index 9ffd6e90b..b16a91494 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -377,6 +377,19 @@ define([
                     Common.Utils.InternalSettings.set("guest-username", value);
                     Common.Utils.InternalSettings.set("save-guest-username", !!value);
                 }
+                if (this.appOptions.customization.font) {
+                    if (this.appOptions.customization.font.family && typeof this.appOptions.customization.font.family === 'string') {
+                        var arr = this.appOptions.customization.font.family.split(',');
+                        for (var i=0; i<arr.length; i++) {
+                            var item = arr[i].trim();
+                            if (item && (/[\s0-9\.]/).test(item)) {
+                                arr[i] = "'" + item + "'";
+                            }
+                        }
+                        document.documentElement.style.setProperty("--font-family-base-custom", arr.join(','));
+                    }
+                }
+
                 this.editorConfig.user          =
                 this.appOptions.user            = Common.Utils.fillUserInfo(this.editorConfig.user, this.editorConfig.lang, value ? (value + ' (' + this.appOptions.guestName + ')' ) : this.textAnonymous,
                                                   Common.localStorage.getItem("guest-id") || ('uid-' + Date.now()));
@@ -1125,7 +1138,8 @@ define([
                         });
                     }
                 } else if (!this.appOptions.isDesktopApp && !this.appOptions.canBrandingExt && !(this.appOptions.isEditDiagram || this.appOptions.isEditMailMerge || this.appOptions.isEditOle) &&
-                    this.editorConfig && this.editorConfig.customization && (this.editorConfig.customization.loaderName || this.editorConfig.customization.loaderLogo)) {
+                    this.editorConfig && this.editorConfig.customization && (this.editorConfig.customization.loaderName || this.editorConfig.customization.loaderLogo ||
+                                                                             this.editorConfig.customization.font && this.editorConfig.customization.font.family)) {
                     Common.UI.warning({
                         title: this.textPaidFeature,
                         msg  : this.textCustomLoader,
@@ -1980,6 +1994,20 @@ define([
                         config.msg = this.errorDirectUrl;
                         break;
 
+                    case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                        config.maxwidth = 600;
+                        if (errData === 'pdf')
+                            config.msg = this.errorInconsistentExtPdf.replace('%1', this.appOptions.spreadsheet.fileType || '');
+                        else if  (errData === 'docx')
+                            config.msg = this.errorInconsistentExtDocx.replace('%1', this.appOptions.spreadsheet.fileType || '');
+                        else if  (errData === 'xlsx')
+                            config.msg = this.errorInconsistentExtXlsx.replace('%1', this.appOptions.spreadsheet.fileType || '');
+                        else if  (errData === 'pptx')
+                            config.msg = this.errorInconsistentExtPptx.replace('%1', this.appOptions.spreadsheet.fileType || '');
+                        else
+                            config.msg = this.errorInconsistentExt;
+                        break;
+
                     default:
                         config.msg = (typeof id == 'string') ? id : this.errorDefaultMessage.replace('%1', id);
                         break;
@@ -3680,7 +3708,12 @@ define([
             confirmAddCellWatchesMax: 'This action will add only {0} cell watches by memory save reason.<br>Do you want to continue?',
             confirmMaxChangesSize: 'The size of actions exceeds the limitation set for your server.<br>Press "Undo" to cancel your last action or press "Continue" to keep action locally (you need to download the file or copy its content to make sure nothing is lost).',
             textUndo: 'Undo',
-            textContinue: 'Continue'
+            textContinue: 'Continue',
+            errorInconsistentExtDocx: 'An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtXlsx: 'An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtPptx: 'An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.',
+            errorInconsistentExtPdf: 'An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.',
+            errorInconsistentExt: 'An error has occurred while opening the file.<br>The file content does not match the file extension.'
         }
     })(), SSE.Controllers.Main || {}))
 });
diff --git a/apps/spreadsheeteditor/main/app/view/FileMenu.js b/apps/spreadsheeteditor/main/app/view/FileMenu.js
index 931c067ab..84b635217 100644
--- a/apps/spreadsheeteditor/main/app/view/FileMenu.js
+++ b/apps/spreadsheeteditor/main/app/view/FileMenu.js
@@ -59,7 +59,7 @@ define([
                         if (item.options.action === 'help') {
                             if ( panel.noHelpContents === true && navigator.onLine ) {
                                 this.fireEvent('item:click', [this, 'external-help', true]);
-                                window.open(panel.urlHelpCenter, '_blank');
+                                !!panel.urlHelpCenter && window.open(panel.urlHelpCenter, '_blank');
                                 return;
                             }
                         }
diff --git a/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js b/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js
index c59828827..88d13dd80 100644
--- a/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js
+++ b/apps/spreadsheeteditor/main/app/view/FileMenuPanels.js
@@ -1900,7 +1900,14 @@ SSE.Views.FileMenuPanels.RecentFiles = Common.UI.BaseView.extend({
             this.menu = options.menu;
             this.urlPref = 'resources/help/{{DEFAULT_LANG}}/';
             this.openUrl = null;
-            this.urlHelpCenter = '{{HELP_CENTER_WEB_SSE}}';
+
+            if ( !Common.Utils.isIE ) {
+                if ( /^https?:\/\//.test('{{HELP_CENTER_WEB_SSE}}') ) {
+                    const _url_obj = new URL('{{HELP_CENTER_WEB_SSE}}');
+                    _url_obj.searchParams.set('lang', Common.Locale.getCurrentLanguage());
+                    this.urlHelpCenter = _url_obj.toString();
+                }
+            }
 
             this.en_data = [
                 {"src": "ProgramInterface/ProgramInterface.htm", "name": "Introducing Spreadsheet Editor user interface", "headername": "Program Interface"},
diff --git a/apps/spreadsheeteditor/main/app/view/HyperlinkSettingsDialog.js b/apps/spreadsheeteditor/main/app/view/HyperlinkSettingsDialog.js
index 9ae19327e..9dccb62b1 100644
--- a/apps/spreadsheeteditor/main/app/view/HyperlinkSettingsDialog.js
+++ b/apps/spreadsheeteditor/main/app/view/HyperlinkSettingsDialog.js
@@ -533,6 +533,8 @@ define([
                         me.dataRangeValid = dlg.getSettings();
                         me.inputRange.setValue(me.dataRangeValid);
                         me.inputRange.checkValidate();
+                        me.isAutoUpdate && me.inputDisplay.setValue(me.internalList.getSelectedRec().get('name') + (me.dataRangeValid!=='' ? '!' + me.dataRangeValid : ''));
+                        me.btnOk.setDisabled($.trim(me.dataRangeValid)=='');
                     }
                 };
 
diff --git a/apps/spreadsheeteditor/main/locale/en.json b/apps/spreadsheeteditor/main/locale/en.json
index 3e8ee1e04..026212389 100644
--- a/apps/spreadsheeteditor/main/locale/en.json
+++ b/apps/spreadsheeteditor/main/locale/en.json
@@ -952,6 +952,11 @@
   "SSE.Controllers.Main.errorWrongBracketsCount": "An error in the entered formula.<br>Wrong number of brackets is used.",
   "SSE.Controllers.Main.errorWrongOperator": "An error in the entered formula. Wrong operator is used.<br>Please correct the error.",
   "SSE.Controllers.Main.errorWrongPassword": "The password you supplied is not correct.",
+  "SSE.Controllers.Main.errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+  "SSE.Controllers.Main.errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+  "SSE.Controllers.Main.errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+  "SSE.Controllers.Main.errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+  "SSE.Controllers.Main.errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension.",
   "SSE.Controllers.Main.errRemDuplicates": "Duplicate values found and deleted: {0}, unique values left: {1}.",
   "SSE.Controllers.Main.leavePageText": "You have unsaved changes in this spreadsheet. Click 'Stay on this Page' then 'Save' to save them. Click 'Leave this Page' to discard all the unsaved changes.",
   "SSE.Controllers.Main.leavePageTextOnClose": "All unsaved changes in this spreadsheet will be lost.<br> Click \"Cancel\" then \"Save\" to save them. Click \"OK\" to discard all the unsaved changes.",
diff --git a/apps/spreadsheeteditor/main/resources/less/toolbar.less b/apps/spreadsheeteditor/main/resources/less/toolbar.less
index 62385c1fd..f9eb5429a 100644
--- a/apps/spreadsheeteditor/main/resources/less/toolbar.less
+++ b/apps/spreadsheeteditor/main/resources/less/toolbar.less
@@ -68,7 +68,7 @@
     border-radius: 0;
     padding: 3px 10px;
     color: #ffffff;
-    font: 11px arial;
+    .font-size-normal();
     pointer-events: none;
     white-space: nowrap;
     letter-spacing: 1px;
@@ -123,6 +123,9 @@
     .separator {
         height: 20px;
     }
+    &.has-open-menu {
+        z-index: @zindex-navbar + 1;
+    }
 }
 
 #slot-field-fontsize {
diff --git a/apps/spreadsheeteditor/mobile/locale/az.json b/apps/spreadsheeteditor/mobile/locale/az.json
index 839a6d5aa..cafc72ec9 100644
--- a/apps/spreadsheeteditor/mobile/locale/az.json
+++ b/apps/spreadsheeteditor/mobile/locale/az.json
@@ -243,7 +243,14 @@
     "uploadImageFileCountMessage": "Heç bir təsvir yüklənməyib.",
     "uploadImageSizeMessage": "Təsvir çox böyükdür. Maksimum ölçü 25 MB-dır.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Parol",
diff --git a/apps/spreadsheeteditor/mobile/locale/be.json b/apps/spreadsheeteditor/mobile/locale/be.json
index 849c4626e..6d69f3613 100644
--- a/apps/spreadsheeteditor/mobile/locale/be.json
+++ b/apps/spreadsheeteditor/mobile/locale/be.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "Statusbar": {
     "textErrNameWrongChar": "Назва не можа змяшчаць сімвалы: \\, /, *, ?, [, ], :",
diff --git a/apps/spreadsheeteditor/mobile/locale/bg.json b/apps/spreadsheeteditor/mobile/locale/bg.json
index 743de89fb..2afe5928d 100644
--- a/apps/spreadsheeteditor/mobile/locale/bg.json
+++ b/apps/spreadsheeteditor/mobile/locale/bg.json
@@ -243,7 +243,14 @@
     "errorChangeOnProtectedSheet": "The cell or chart you are trying to change is on a protected sheet. To make a change, unprotect the sheet. You might be requested to enter a password.",
     "textErrorPasswordIsNotCorrect": "The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/spreadsheeteditor/mobile/locale/ca.json b/apps/spreadsheeteditor/mobile/locale/ca.json
index b6758f430..b0dcc0aaa 100644
--- a/apps/spreadsheeteditor/mobile/locale/ca.json
+++ b/apps/spreadsheeteditor/mobile/locale/ca.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Format d'imatge desconegut.",
     "uploadImageFileCountMessage": "No s'ha carregat cap imatge.",
     "uploadImageSizeMessage": "La imatge és massa gran. La mida màxima és de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Contrasenya",
diff --git a/apps/spreadsheeteditor/mobile/locale/cs.json b/apps/spreadsheeteditor/mobile/locale/cs.json
index 29ff445e2..c296515e3 100644
--- a/apps/spreadsheeteditor/mobile/locale/cs.json
+++ b/apps/spreadsheeteditor/mobile/locale/cs.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Neznámý formát obrázku.",
     "uploadImageFileCountMessage": "Nenahrány žádné obrázky.",
     "uploadImageSizeMessage": "Obrázek je příliš velký. Maximální velikost je 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Heslo",
diff --git a/apps/spreadsheeteditor/mobile/locale/da.json b/apps/spreadsheeteditor/mobile/locale/da.json
index b9df245d0..bda43480a 100644
--- a/apps/spreadsheeteditor/mobile/locale/da.json
+++ b/apps/spreadsheeteditor/mobile/locale/da.json
@@ -243,7 +243,14 @@
     "textErrorPasswordIsNotCorrect": "The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.",
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Kodeord",
diff --git a/apps/spreadsheeteditor/mobile/locale/de.json b/apps/spreadsheeteditor/mobile/locale/de.json
index 2de351e4d..f105de509 100644
--- a/apps/spreadsheeteditor/mobile/locale/de.json
+++ b/apps/spreadsheeteditor/mobile/locale/de.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Unbekanntes Bildformat.",
     "uploadImageFileCountMessage": "Keine Bilder hochgeladen.",
     "uploadImageSizeMessage": "Die maximal zulässige Bildgröße von 25 MB ist überschritten.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Passwort",
diff --git a/apps/spreadsheeteditor/mobile/locale/el.json b/apps/spreadsheeteditor/mobile/locale/el.json
index 24a3db31d..11517c933 100644
--- a/apps/spreadsheeteditor/mobile/locale/el.json
+++ b/apps/spreadsheeteditor/mobile/locale/el.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Άγνωστη μορφή εικόνας.",
     "uploadImageFileCountMessage": "Δεν μεταφορτώθηκαν εικόνες.",
     "uploadImageSizeMessage": "Η εικόνα είναι πολύ μεγάλη. Το μέγιστο μέγεθος είναι 25MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Συνθηματικό",
diff --git a/apps/spreadsheeteditor/mobile/locale/en.json b/apps/spreadsheeteditor/mobile/locale/en.json
index bedcbb8a9..cf9e5d0ea 100644
--- a/apps/spreadsheeteditor/mobile/locale/en.json
+++ b/apps/spreadsheeteditor/mobile/locale/en.json
@@ -245,7 +245,12 @@
     "uploadImageFileCountMessage": "No images uploaded.",
     "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
     "textCancel": "Cancel",
-    "textOk": "Ok"
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Password",
diff --git a/apps/spreadsheeteditor/mobile/locale/es.json b/apps/spreadsheeteditor/mobile/locale/es.json
index 6f684299a..b58a265de 100644
--- a/apps/spreadsheeteditor/mobile/locale/es.json
+++ b/apps/spreadsheeteditor/mobile/locale/es.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Formato de imagen desconocido.",
     "uploadImageFileCountMessage": "No hay imágenes subidas.",
     "uploadImageSizeMessage": "La imagen es demasiado grande. El tamaño máximo es de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Contraseña",
diff --git a/apps/spreadsheeteditor/mobile/locale/eu.json b/apps/spreadsheeteditor/mobile/locale/eu.json
index f92c1786a..2cd038f3f 100644
--- a/apps/spreadsheeteditor/mobile/locale/eu.json
+++ b/apps/spreadsheeteditor/mobile/locale/eu.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Irudi formatu ezezaguna.",
     "uploadImageFileCountMessage": "Ez da irudirik kargatu.",
     "uploadImageSizeMessage": "Irudia handiegia da. Gehienezko tamaina 25 MB da.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Pasahitza",
diff --git a/apps/spreadsheeteditor/mobile/locale/fr.json b/apps/spreadsheeteditor/mobile/locale/fr.json
index 3a2235eb7..eef8d0e6c 100644
--- a/apps/spreadsheeteditor/mobile/locale/fr.json
+++ b/apps/spreadsheeteditor/mobile/locale/fr.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Erreur inconnue.",
     "uploadImageExtMessage": "Format d'image inconnu.",
     "uploadImageFileCountMessage": "Aucune image chargée.",
-    "uploadImageSizeMessage": "L'image est trop grande. La taille limite est de 25 Mo."
+    "uploadImageSizeMessage": "L'image est trop grande. La taille limite est de 25 Mo.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Mot de passe",
diff --git a/apps/spreadsheeteditor/mobile/locale/gl.json b/apps/spreadsheeteditor/mobile/locale/gl.json
index 9ea5e1dd8..42bb72d4e 100644
--- a/apps/spreadsheeteditor/mobile/locale/gl.json
+++ b/apps/spreadsheeteditor/mobile/locale/gl.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Formato de imaxe descoñecido.",
     "uploadImageFileCountMessage": "Non hai imaxes subidas.",
     "uploadImageSizeMessage": "A imaxe é demasiado grande. O tamaño máximo é de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Contrasinal",
diff --git a/apps/spreadsheeteditor/mobile/locale/hu.json b/apps/spreadsheeteditor/mobile/locale/hu.json
index 454a97ad7..08f295add 100644
--- a/apps/spreadsheeteditor/mobile/locale/hu.json
+++ b/apps/spreadsheeteditor/mobile/locale/hu.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Ismeretlen hiba.",
     "uploadImageExtMessage": "Ismeretlen képformátum.",
     "uploadImageFileCountMessage": "Nincs kép feltöltve.",
-    "uploadImageSizeMessage": "A kép túl nagy. A maximális méret 25 MB."
+    "uploadImageSizeMessage": "A kép túl nagy. A maximális méret 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Jelszó",
diff --git a/apps/spreadsheeteditor/mobile/locale/hy.json b/apps/spreadsheeteditor/mobile/locale/hy.json
index 62ec698cf..c21c4a406 100644
--- a/apps/spreadsheeteditor/mobile/locale/hy.json
+++ b/apps/spreadsheeteditor/mobile/locale/hy.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Անհայտ սխալ։",
     "uploadImageExtMessage": "Նկարի անհայտ ձևաչափ։",
     "uploadImageFileCountMessage": "Ոչ մի նկար չի բեռնվել։",
-    "uploadImageSizeMessage": "Պատկերը չափազանց մեծ է:Առավելագույն չափը 25 ՄԲ է:"
+    "uploadImageSizeMessage": "Պատկերը չափազանց մեծ է:Առավելագույն չափը 25 ՄԲ է:",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Գաղտնաբառ",
diff --git a/apps/spreadsheeteditor/mobile/locale/id.json b/apps/spreadsheeteditor/mobile/locale/id.json
index 93168b541..31037cdf1 100644
--- a/apps/spreadsheeteditor/mobile/locale/id.json
+++ b/apps/spreadsheeteditor/mobile/locale/id.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Kesalahan tidak diketahui.",
     "uploadImageExtMessage": "Format gambar tidak dikenal.",
     "uploadImageFileCountMessage": "Tidak ada gambar yang diunggah.",
-    "uploadImageSizeMessage": "Melebihi ukuran maksimal file. Ukuran maksimum adalah 25 MB."
+    "uploadImageSizeMessage": "Melebihi ukuran maksimal file. Ukuran maksimum adalah 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Kata Sandi",
diff --git a/apps/spreadsheeteditor/mobile/locale/it.json b/apps/spreadsheeteditor/mobile/locale/it.json
index 352fb9cec..a21e34f90 100644
--- a/apps/spreadsheeteditor/mobile/locale/it.json
+++ b/apps/spreadsheeteditor/mobile/locale/it.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Formato d'immagine sconosciuto.",
     "uploadImageFileCountMessage": "Nessuna immagine caricata.",
     "uploadImageSizeMessage": "L'immagine è troppo grande. La dimensione massima è 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Password",
diff --git a/apps/spreadsheeteditor/mobile/locale/ja.json b/apps/spreadsheeteditor/mobile/locale/ja.json
index 8f63526f7..e4b75b6e3 100644
--- a/apps/spreadsheeteditor/mobile/locale/ja.json
+++ b/apps/spreadsheeteditor/mobile/locale/ja.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "不明なエラー",
     "uploadImageExtMessage": "不明なイメージ形式",
     "uploadImageFileCountMessage": "アップロードしたイメージがない",
-    "uploadImageSizeMessage": "イメージのサイズの上限が超えさせました。サイズの上限が２５MB。"
+    "uploadImageSizeMessage": "イメージのサイズの上限が超えさせました。サイズの上限が２５MB。",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "パスワード",
diff --git a/apps/spreadsheeteditor/mobile/locale/ko.json b/apps/spreadsheeteditor/mobile/locale/ko.json
index 99f2a4061..242cf6ecd 100644
--- a/apps/spreadsheeteditor/mobile/locale/ko.json
+++ b/apps/spreadsheeteditor/mobile/locale/ko.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "알수 없는 이미지 형식입니다.",
     "uploadImageFileCountMessage": "이미지가 업로드되지 않았습니다.",
     "uploadImageSizeMessage": "이미지 크기 제한을 초과했습니다.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "암호",
diff --git a/apps/spreadsheeteditor/mobile/locale/lo.json b/apps/spreadsheeteditor/mobile/locale/lo.json
index 3253cfbaa..80aec002a 100644
--- a/apps/spreadsheeteditor/mobile/locale/lo.json
+++ b/apps/spreadsheeteditor/mobile/locale/lo.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "ບໍ່ຮູ້ສາເຫດຂໍ້ຜິພາດຮູບແບບຂອງຮູບ",
     "uploadImageFileCountMessage": "ບໍ່ມີຮູບພາບອັບໂຫລດ",
     "uploadImageSizeMessage": "ຮູບພາບໃຫຍ່ເກີນໄປ. ຂະຫນາດສູງສຸດແມ່ນ 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "ລະຫັດຜ່ານ",
diff --git a/apps/spreadsheeteditor/mobile/locale/lv.json b/apps/spreadsheeteditor/mobile/locale/lv.json
index a148799bd..8e8a00037 100644
--- a/apps/spreadsheeteditor/mobile/locale/lv.json
+++ b/apps/spreadsheeteditor/mobile/locale/lv.json
@@ -243,7 +243,14 @@
     "errorChangeOnProtectedSheet": "The cell or chart you are trying to change is on a protected sheet. To make a change, unprotect the sheet. You might be requested to enter a password.",
     "textErrorPasswordIsNotCorrect": "The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/spreadsheeteditor/mobile/locale/ms.json b/apps/spreadsheeteditor/mobile/locale/ms.json
index 78cf19104..9c875c606 100644
--- a/apps/spreadsheeteditor/mobile/locale/ms.json
+++ b/apps/spreadsheeteditor/mobile/locale/ms.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Format imej yang tidak diketahui.",
     "uploadImageFileCountMessage": "Tiada Imej dimuat naik.",
     "uploadImageSizeMessage": "Imej terlalu besar. Saiz maksimum adalah 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Kata laluan",
diff --git a/apps/spreadsheeteditor/mobile/locale/nb.json b/apps/spreadsheeteditor/mobile/locale/nb.json
index a148799bd..8e8a00037 100644
--- a/apps/spreadsheeteditor/mobile/locale/nb.json
+++ b/apps/spreadsheeteditor/mobile/locale/nb.json
@@ -243,7 +243,14 @@
     "errorChangeOnProtectedSheet": "The cell or chart you are trying to change is on a protected sheet. To make a change, unprotect the sheet. You might be requested to enter a password.",
     "textErrorPasswordIsNotCorrect": "The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/spreadsheeteditor/mobile/locale/nl.json b/apps/spreadsheeteditor/mobile/locale/nl.json
index 2139acd09..34f232e66 100644
--- a/apps/spreadsheeteditor/mobile/locale/nl.json
+++ b/apps/spreadsheeteditor/mobile/locale/nl.json
@@ -243,7 +243,14 @@
     "uploadImageFileCountMessage": "Geen afbeeldingen geüpload.",
     "uploadImageSizeMessage": "De afbeelding is te groot. De maximale grootte is 25MB.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Wachtwoord",
diff --git a/apps/spreadsheeteditor/mobile/locale/pl.json b/apps/spreadsheeteditor/mobile/locale/pl.json
index a148799bd..8e8a00037 100644
--- a/apps/spreadsheeteditor/mobile/locale/pl.json
+++ b/apps/spreadsheeteditor/mobile/locale/pl.json
@@ -243,7 +243,14 @@
     "errorChangeOnProtectedSheet": "The cell or chart you are trying to change is on a protected sheet. To make a change, unprotect the sheet. You might be requested to enter a password.",
     "textErrorPasswordIsNotCorrect": "The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/spreadsheeteditor/mobile/locale/pt-pt.json b/apps/spreadsheeteditor/mobile/locale/pt-pt.json
index 16439a8fc..feadb8e89 100644
--- a/apps/spreadsheeteditor/mobile/locale/pt-pt.json
+++ b/apps/spreadsheeteditor/mobile/locale/pt-pt.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Erro desconhecido.",
     "uploadImageExtMessage": "Formato de imagem desconhecido.",
     "uploadImageFileCountMessage": "Nenhuma imagem foi carregada.",
-    "uploadImageSizeMessage": "A imagem é muito grande. O tamanho máximo é de 25 MB."
+    "uploadImageSizeMessage": "A imagem é muito grande. O tamanho máximo é de 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Palavra-passe",
diff --git a/apps/spreadsheeteditor/mobile/locale/pt.json b/apps/spreadsheeteditor/mobile/locale/pt.json
index e0bbebbf3..206d5c8a5 100644
--- a/apps/spreadsheeteditor/mobile/locale/pt.json
+++ b/apps/spreadsheeteditor/mobile/locale/pt.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Erro desconhecido.",
     "uploadImageExtMessage": "Formato de imagem desconhecido.",
     "uploadImageFileCountMessage": "Sem imagens carregadas.",
-    "uploadImageSizeMessage": "Tamanho limite máximo da imagem excedido. O tamanho máximo é de 25 MB."
+    "uploadImageSizeMessage": "Tamanho limite máximo da imagem excedido. O tamanho máximo é de 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Senha",
diff --git a/apps/spreadsheeteditor/mobile/locale/ro.json b/apps/spreadsheeteditor/mobile/locale/ro.json
index 6412dc862..d6dd049c1 100644
--- a/apps/spreadsheeteditor/mobile/locale/ro.json
+++ b/apps/spreadsheeteditor/mobile/locale/ro.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Format de imagine nerecunoscut.",
     "uploadImageFileCountMessage": "Nicio imagine nu a fost încărcată.",
     "uploadImageSizeMessage": "Imaginea este prea mare. Limita de dimensiune este de 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Parola",
diff --git a/apps/spreadsheeteditor/mobile/locale/ru.json b/apps/spreadsheeteditor/mobile/locale/ru.json
index 27734a7e5..c8e066073 100644
--- a/apps/spreadsheeteditor/mobile/locale/ru.json
+++ b/apps/spreadsheeteditor/mobile/locale/ru.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Неизвестная ошибка.",
     "uploadImageExtMessage": "Неизвестный формат рисунка.",
     "uploadImageFileCountMessage": "Ни одного рисунка не загружено.",
-    "uploadImageSizeMessage": "Слишком большой рисунок. Максимальный размер - 25 MB."
+    "uploadImageSizeMessage": "Слишком большой рисунок. Максимальный размер - 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Пароль",
diff --git a/apps/spreadsheeteditor/mobile/locale/sk.json b/apps/spreadsheeteditor/mobile/locale/sk.json
index ceaf7a402..e86335284 100644
--- a/apps/spreadsheeteditor/mobile/locale/sk.json
+++ b/apps/spreadsheeteditor/mobile/locale/sk.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "Neznámy formát obrázka.",
     "uploadImageFileCountMessage": "Neboli načítané žiadne obrázky.",
     "uploadImageSizeMessage": "Obrázok je príliš veľký. Maximálna veľkosť je 25 MB.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Heslo",
diff --git a/apps/spreadsheeteditor/mobile/locale/sl.json b/apps/spreadsheeteditor/mobile/locale/sl.json
index 7d4b037b4..9e0e2098c 100644
--- a/apps/spreadsheeteditor/mobile/locale/sl.json
+++ b/apps/spreadsheeteditor/mobile/locale/sl.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Password",
diff --git a/apps/spreadsheeteditor/mobile/locale/tr.json b/apps/spreadsheeteditor/mobile/locale/tr.json
index bfcd4a065..717077c7e 100644
--- a/apps/spreadsheeteditor/mobile/locale/tr.json
+++ b/apps/spreadsheeteditor/mobile/locale/tr.json
@@ -243,7 +243,14 @@
     "uploadImageFileCountMessage": "Resim yüklenmedi.",
     "uploadImageSizeMessage": "Görüntü çok büyük. Maksimum boyut 25 MB'dir.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Şifre",
diff --git a/apps/spreadsheeteditor/mobile/locale/uk.json b/apps/spreadsheeteditor/mobile/locale/uk.json
index 104e06819..9b78c57eb 100644
--- a/apps/spreadsheeteditor/mobile/locale/uk.json
+++ b/apps/spreadsheeteditor/mobile/locale/uk.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "Unknown error.",
     "uploadImageExtMessage": "Unknown image format.",
     "uploadImageFileCountMessage": "No images uploaded.",
-    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB."
+    "uploadImageSizeMessage": "The image is too big. The maximum size is 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "Password",
diff --git a/apps/spreadsheeteditor/mobile/locale/vi.json b/apps/spreadsheeteditor/mobile/locale/vi.json
index a148799bd..8e8a00037 100644
--- a/apps/spreadsheeteditor/mobile/locale/vi.json
+++ b/apps/spreadsheeteditor/mobile/locale/vi.json
@@ -243,7 +243,14 @@
     "errorChangeOnProtectedSheet": "The cell or chart you are trying to change is on a protected sheet. To make a change, unprotect the sheet. You might be requested to enter a password.",
     "textErrorPasswordIsNotCorrect": "The password you supplied is not correct.<br>Verify that the CAPS LOCK key is off and be sure to use the correct capitalization.",
     "errorCannotUseCommandProtectedSheet": "You cannot use this command on a protected sheet. To use this command, unprotect the sheet.<br>You might be requested to enter a password.",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "applyChangesTextText": "Loading data...",
diff --git a/apps/spreadsheeteditor/mobile/locale/zh-tw.json b/apps/spreadsheeteditor/mobile/locale/zh-tw.json
index 91ccb6930..633e488a9 100644
--- a/apps/spreadsheeteditor/mobile/locale/zh-tw.json
+++ b/apps/spreadsheeteditor/mobile/locale/zh-tw.json
@@ -243,7 +243,14 @@
     "uploadImageExtMessage": "圖片格式未知。",
     "uploadImageFileCountMessage": "沒有上傳圖片。",
     "uploadImageSizeMessage": "圖像超出最大大小限制。最大大小為25MB。",
-    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading."
+    "errorDirectUrl": "Please verify the link to the document.<br>This link must be a direct link to the file for downloading.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "密碼",
diff --git a/apps/spreadsheeteditor/mobile/locale/zh.json b/apps/spreadsheeteditor/mobile/locale/zh.json
index e20ebcf88..5122846f5 100644
--- a/apps/spreadsheeteditor/mobile/locale/zh.json
+++ b/apps/spreadsheeteditor/mobile/locale/zh.json
@@ -243,7 +243,14 @@
     "unknownErrorText": "未知错误。",
     "uploadImageExtMessage": "未知图像格式。",
     "uploadImageFileCountMessage": "没有图片上传",
-    "uploadImageSizeMessage": "图片太大了。最大允许的大小是 25 MB."
+    "uploadImageSizeMessage": "图片太大了。最大允许的大小是 25 MB.",
+    "textCancel": "Cancel",
+    "textOk": "Ok",
+    "errorInconsistentExtDocx": "An error has occurred while opening the file.<br>The file content corresponds to text documents (e.g. docx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtXlsx": "An error has occurred while opening the file.<br>The file content corresponds to spreadsheets (e.g. xlsx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPptx": "An error has occurred while opening the file.<br>The file content corresponds to presentations (e.g. pptx), but the file has the inconsistent extension: %1.",
+    "errorInconsistentExtPdf": "An error has occurred while opening the file.<br>The file content corresponds to one of the following formats: pdf/djvu/xps/oxps, but the file has the inconsistent extension: %1.",
+    "errorInconsistentExt": "An error has occurred while opening the file.<br>The file content does not match the file extension."
   },
   "LongActions": {
     "advDRMPassword": "密码",
diff --git a/apps/spreadsheeteditor/mobile/src/controller/Error.jsx b/apps/spreadsheeteditor/mobile/src/controller/Error.jsx
index d6c2b29f5..5afe5337c 100644
--- a/apps/spreadsheeteditor/mobile/src/controller/Error.jsx
+++ b/apps/spreadsheeteditor/mobile/src/controller/Error.jsx
@@ -3,7 +3,7 @@ import { inject } from 'mobx-react';
 import { f7 } from 'framework7-react';
 import { useTranslation } from 'react-i18next';
 
-const ErrorController = inject('storeAppOptions')(({storeAppOptions, LoadingDocument}) => {
+const ErrorController = inject('storeAppOptions','storeSpreadsheetInfo')(({storeAppOptions, storeSpreadsheetInfo, LoadingDocument}) => {
     const { t } = useTranslation();
     const _t = t("Error", { returnObjects: true });
 
@@ -328,6 +328,20 @@ const ErrorController = inject('storeAppOptions')(({storeAppOptions, LoadingDocu
                 config.msg = _t.errorDirectUrl;
                 break;
 
+            case Asc.c_oAscError.ID.ConvertationOpenFormat:
+                let docExt = storeSpreadsheetInfo.dataDoc ? storeSpreadsheetInfo.dataDoc.fileType || '' : '';
+                if (errData === 'pdf')
+                    config.msg = _t.errorInconsistentExtPdf.replace('%1', docExt);
+                else if  (errData === 'docx')
+                    config.msg = _t.errorInconsistentExtDocx.replace('%1', docExt);
+                else if  (errData === 'xlsx')
+                    config.msg = _t.errorInconsistentExtXlsx.replace('%1', docExt);
+                else if  (errData === 'pptx')
+                    config.msg = _t.errorInconsistentExtPptx.replace('%1', docExt);
+                else
+                    config.msg = _t.errorInconsistentExt;
+                break;
+
             default:
                 config.msg = _t.errorDefaultMessage.replace('%1', id);
                 break;