diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index d79bdd1c..90513981 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1206,5 +1206,9 @@
   "prefs_OptionText_spamfilter_context_menu_Info": {
     "message": "If checked, the \"Analyze for spam\" context menu item will be shown when right-clicking on an email in the messages list.",
     "description": ""
+  },
+  "noActiveCalendar": {
+    "message": "No active calendar found!",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/js/mzta-menus.js b/js/mzta-menus.js
index 4ec3dcf1..36f236cd 100644
--- a/js/mzta-menus.js
+++ b/js/mzta-menus.js
@@ -238,6 +238,9 @@ export class mzta_Menus {
                                 taWorkingStatus.stopWorking();
                                 return {ok:'1'};
                             } else {
+                                if (result_openCalendarEventDialog.error.startsWith("|>>")) {
+                                    result_openCalendarEventDialog.error = browser.i18n.getMessage(result_openCalendarEventDialog.error.substring(3));
+                                }
                                 browser.tabs.sendMessage(tabs[0].id, { command: "sendAlert", curr_tab_type: tabs[0].type, message: browser.i18n.getMessage("calendar_opening_dialog_error") + ": " + result_openCalendarEventDialog.error });
                                 taWorkingStatus.stopWorking();
                                 return {ok:'0'};