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Information on how to add the Google 'Tasks' into Thunderbird Calendar: I have a gmail imap account using OAuth2 as Authentication Method.

File > New > Calendar, select 'Google Calendar' >  click on 'Next' choose or enter: gmail email address   > click on 'Find Calendars' Select 'My Tasks' and click on 'Subscribe'

You may be asked to enter password as per Oauth2 Authentication.

See image. It shows the selection available when you follow instructions. It shows where 'My Tasks' is located in the Calendar list. I selected 'My Tasks' and then clicked on 'Task'. Create the Task and save. Task is shown in Thunderbird and on the right side you can see the Task is displayed via the webmail access using a browser.

I've been using Thunderbird for work for a few years and a few months ago my calendar integration with my Google Calendar stopped working. I've tried everything I can think of including re-installing calendars, but without success. My Thunderbird at home can still accept invites, but not on my work computer despite verifying that the calendar address and such is the same.

Initially, when I'd click 'Accept' on an invite, nothing would happen (ie no prompt, failure etc), the invite would just stay there without response. Now it's asking me if I want to link it with one of two different calendars I have, both of which I've verified under the calendar on Thunderbird that it isn't associated with an email address (has the yellow bar at the top saying if you want to use this calendar to store invitations you need to associate with an email address).

I can't think of what to do for next steps for troubleshooting, any thoughts?

I'm migrating to a new computer and from Windows 10 to W11. I have successfully exported/imported the contacts using the export tool, but cannot figure out how to ex/im the calendar. I am using a SanDisk drive to move the files. Both systems have TBird 102.1.2 (64-bit).

Please give step-by-step instructions to do the calendar (only) ex/im. I do not use the Mail feature.

Network calendars no longer seem to be working after upgrade to Thunderbird 102.4.1.

For example, my previously working calendar to this Google vCal calendar no longer syncs. I also had working read/write network CalDAV calendars that are now broken.

I tried deleting and recreating the calendars, but to no avail. Any help would be appreciated.

Here is some output captured from the Thunderbird error console:

services.settings: Failed to load last_modified.json: TypeError: NetworkError when attempting to fetch resource. Utils.jsm:330 Successfully loaded OpenPGP library librnp.so version 0.16+git20220124.f06439f7.MZLA from /usr/lib/thunderbird/librnp.so RNPLib.jsm:100:15 Calendar: Error updating timezones: [Exception... "Component returned failure code: 0x8052000b (NS_ERROR_FILE_CORRUPTED) [mozIStorageStatement.executeStep]" nsresult: "0x8052000b (NS_ERROR_FILE_CORRUPTED)" location: "JS frame :: resource:///modules/calendar/calStorageUpgrade.jsm :: ensureUpdatedTimezones :: line 481" data: no] DB Error database disk image is malformed calStorageUpgrade.jsm:493 Calendar: Can't create calendar for a492e639-69c4-4514-9de9-cc77d8e14adf (caldav, http://kolab.huott.org/iRony/calendars/tj.huot3%40huott.org/3eba43a8583db714): [Exception... "[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]'[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]' when calling method: [calIChangeLog::offlineStorage]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: resource:///components/calCachedCalendar.js :: calCachedCalendar :: line 125" data: yes] CalCalendarManager.jsm:536 Calendar: Error updating timezones: [Exception... "Component returned failure code: 0x8052000b (NS_ERROR_FILE_CORRUPTED) [mozIStorageStatement.executeStep]" nsresult: "0x8052000b (NS_ERROR_FILE_CORRUPTED)" location: "JS frame :: resource:///modules/calendar/calStorageUpgrade.jsm :: ensureUpdatedTimezones :: line 481" data: no] DB Error database disk image is malformed calStorageUpgrade.jsm:493 Calendar: Can't create calendar for e0c464a8-9ddd-415f-a80d-0b6b275916e1 (caldav, http://kolab.huott.org/iRony/calendars/tj.huot3%40huott.org/14491c77551ebdeb): [Exception... "[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]'[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]' when calling method: [calIChangeLog::offlineStorage]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: resource:///components/calCachedCalendar.js :: calCachedCalendar :: line 125" data: yes] CalCalendarManager.jsm:536 Calendar: Error updating timezones: [Exception... "Component returned failure code: 0x8052000b (NS_ERROR_FILE_CORRUPTED) [mozIStorageStatement.executeStep]" nsresult: "0x8052000b (NS_ERROR_FILE_CORRUPTED)" location: "JS frame :: resource:///modules/calendar/calStorageUpgrade.jsm :: ensureUpdatedTimezones :: line 481" data: no] DB Error database disk image is malformed calStorageUpgrade.jsm:493 Calendar: Can't create calendar for 2fb867d2-1cd0-47a6-a708-689483a2caf3 (caldav, http://kolab.huott.org/iRony/calendars/tj.huot3%40huott.org/14491c77551ebdeb): [Exception... "[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]'[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]' when calling method: [calIChangeLog::offlineStorage]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: resource:///components/calCachedCalendar.js :: calCachedCalendar :: line 125" data: yes] CalCalendarManager.jsm:536 Calendar: Error updating timezones: [Exception... "Component returned failure code: 0x8052000b (NS_ERROR_FILE_CORRUPTED) [mozIStorageStatement.executeStep]" nsresult: "0x8052000b (NS_ERROR_FILE_CORRUPTED)" location: "JS frame :: resource:///modules/calendar/calStorageUpgrade.jsm :: ensureUpdatedTimezones :: line 481" data: no] DB Error database disk image is malformed calStorageUpgrade.jsm:493 Calendar: Can't create calendar for 6fadcc20-1e0e-4354-8a4a-448122a94f7c (caldav, http://kolab.huott.org/iRony/calendars/tj.huot3%40huott.org/3eba43a8583db714): [Exception... "[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]'[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]' when calling method: [calIChangeLog::offlineStorage]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: resource:///components/calCachedCalendar.js :: calCachedCalendar :: line 125" data: yes] CalCalendarManager.jsm:536 Calendar: Error updating timezones: [Exception... "Component returned failure code: 0x8052000b (NS_ERROR_FILE_CORRUPTED) [mozIStorageStatement.executeStep]" nsresult: "0x8052000b (NS_ERROR_FILE_CORRUPTED)" location: "JS frame :: resource:///modules/calendar/calStorageUpgrade.jsm :: ensureUpdatedTimezones :: line 481" data: no] DB Error database disk image is malformed 2 calStorageUpgrade.jsm:493 Calendar: Can't create calendar for fc962630-e37e-4b2b-9999-ed3018434456 (caldav, http://kolab.huott.org/iRony/calendars/tj.huot3%40huott.org/14491c77551ebdeb): [Exception... "[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]'[JavaScript Error: "this.mOfflineStorage is null" {file: "resource:///modules/CalDavCalendar.jsm" line: 280}]' when calling method: [calIChangeLog::offlineStorage]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: resource:///components/calCachedCalendar.js :: calCachedCalendar :: line 125" data: yes] CalCalendarManager.jsm:536 Calendar: Error updating timezones: [Exception... "Component returned failure code: 0x8052000b (NS_ERROR_FILE_CORRUPTED) [mozIStorageStatement.executeStep]" nsresult: "0x8052000b (NS_ERROR_FILE_CORRUPTED)" location: "JS frame :: resource:///modules/calendar/calStorageUpgrade.jsm :: ensureUpdatedTimezones :: line 481" data: no] DB Error database disk image is malformed calStorageUpgrade.jsm:493 Found 145 public keys and 4 secret keys (4 protected, 0 unprotected) RNPLib.jsm:301:15 Successfully loaded optional OpenPGP library libgpgme.so.11 from system's standard library locations GPGMELib.jsm:69:13 gpgme version: 1.16.0-unknown GPGMELib.jsm:241:15 Trying to load /usr/lib/thunderbird/libotr.so OTRLib.jsm:64:11 Trying to load libotr.so from system's standard library locations OTRLib.jsm:64:11 Trying to load libotr.so.5 from system's standard library locations OTRLib.jsm:64:11 Trying to load libotr.so from system's standard library locations OTRLib.jsm:64:11 Error: Cannot load required OTR library

   loadExternalOTRLib resource:///modules/OTRLib.jsm:109
   init resource:///modules/OTRLib.jsm:115
   once resource:///modules/OTR.jsm:118
   init resource:///modules/OTR.jsm:139
   init resource:///modules/OTRUI.jsm:256
   nsIPrompt_promptPassword resource:///modules/MsgAsyncPrompter.jsm:621
   promptPassword resource:///modules/MsgAsyncPrompter.jsm:389
   _promiseAuthPrompt resource:///modules/MsgAsyncPrompter.jsm:54
   _promiseAuthPrompt resource:///modules/MsgAsyncPrompter.jsm:52
   run resource:///modules/MsgAsyncPrompter.jsm:77

OTR.jsm:127:15 Calendar: [calICSService] Error in parser worker: [object Object] calICSService.js:588 Calendar: Error Parsing ICS: 2147500037 CalIcsParser.jsm:146 carddav.sync: Sync with server failed. CardDAVDirectory.jsm:645:11 This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. 60 calItemBase.js:431:30 TypeError: obj is null calCachedCalendar.js:921:9 TypeError: obj is null calCachedCalendar.js:921:9 This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. 162 calItemBase.js:431:30 TypeError: obj is null calCachedCalendar.js:921:9 TypeError: obj is null calCachedCalendar.js:921:9 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-filter.js", lineNumber: 967, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-filter.js:967:17\n#refreshCalendar@chrome://calendar/content/widgets/calendar-filter.js:1234:60\nonLoad@chrome://calendar/content/widgets/calendar-filter.js:1283:37\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotifyCalendarObservers@resource:///modules/CalCalendarManager.jsm:619:29\nonLoad@resource:///modules/CalCalendarManager.jsm:657:24\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-filter.js:967 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-minimonth.js", lineNumber: 818, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-minimonth.js:818:18\nonLoad@chrome://calendar/content/widgets/calendar-minimonth.js:419:12\ngetInterfaceProxy/get/<@chrome://global/content/customElements.js:696:35\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///modules/CalCompositeCalendar.jsm:33:34\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-minimonth.js:818 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-filter.js", lineNumber: 967, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-filter.js:967:17\n#refreshCalendar@chrome://calendar/content/widgets/calendar-filter.js:1234:60\nonLoad@chrome://calendar/content/widgets/calendar-filter.js:1283:37\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotifyCalendarObservers@resource:///modules/CalCalendarManager.jsm:619:29\nonLoad@resource:///modules/CalCalendarManager.jsm:657:24\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-filter.js:967 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-minimonth.js", lineNumber: 818, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-minimonth.js:818:18\nonLoad@chrome://calendar/content/widgets/calendar-minimonth.js:419:12\ngetInterfaceProxy/get/<@chrome://global/content/customElements.js:696:35\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///modules/CalCompositeCalendar.jsm:33:34\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-minimonth.js:818 Calendar: [calICSService] Error in parser worker: [object Object] calICSService.js:588 Calendar: Error Parsing ICS: 2147500037 CalIcsParser.jsm:146 TypeError: obj is null 4 calCachedCalendar.js:921:9 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "resource:///modules/CalCompositeCalendar.jsm", lineNumber: 369, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "start@resource:///modules/CalCompositeCalendar.jsm:369:24\n", location: XPCWrappedNative_NoHelper } 4 CalCompositeCalendar.jsm:369 This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. Troubleshoot.jsm:651:30 WebGL warning: <Create>: WebglAllowWindowsNativeGl:false restricts context creation on this system. Troubleshoot.jsm:680:21 Failed to create WebGL context: WebGL creation failed:

• WebglAllowWindowsNativeGl:false restricts context creation on this system. ()
• Exhausted GL driver options. (FEATURE_FAILURE_WEBGL_EXHAUSTED_DRIVERS) Troubleshoot.jsm:680:21

WebGL warning: <Create>: AllowWebgl2:false restricts context creation on this system. Troubleshoot.jsm:680:21 Failed to create WebGL context: WebGL creation failed:

• AllowWebgl2:false restricts context creation on this system. () Troubleshoot.jsm:680:21

This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. MsgComposeCommands.js:10566:14 This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. 3 blank This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. {516f89af-5ad1-4152-a904-3c3b1b3697f6} This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. blank This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. 111 calItemBase.js:431:30 TypeError: obj is null calCachedCalendar.js:921:9 TypeError: obj is null calCachedCalendar.js:921:9 This page is in Quirks Mode. Page layout may be impacted. For Standards Mode use “”. 162 calItemBase.js:431:30 TypeError: obj is null calCachedCalendar.js:921:9 TypeError: obj is null calCachedCalendar.js:921:9 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-filter.js", lineNumber: 967, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-filter.js:967:17\n#refreshCalendar@chrome://calendar/content/widgets/calendar-filter.js:1234:60\nonLoad@chrome://calendar/content/widgets/calendar-filter.js:1283:37\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotifyCalendarObservers@resource:///modules/CalCalendarManager.jsm:619:29\nonLoad@resource:///modules/CalCalendarManager.jsm:657:24\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-filter.js:967 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-minimonth.js", lineNumber: 818, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-minimonth.js:818:18\nonLoad@chrome://calendar/content/widgets/calendar-minimonth.js:419:12\ngetInterfaceProxy/get/<@chrome://global/content/customElements.js:696:35\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///modules/CalCompositeCalendar.jsm:33:34\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-minimonth.js:818 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-filter.js", lineNumber: 967, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-filter.js:967:17\n#refreshCalendar@chrome://calendar/content/widgets/calendar-filter.js:1234:60\nonLoad@chrome://calendar/content/widgets/calendar-filter.js:1283:37\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotifyCalendarObservers@resource:///modules/CalCalendarManager.jsm:619:29\nonLoad@resource:///modules/CalCalendarManager.jsm:657:24\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-filter.js:967 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "chrome://calendar/content/widgets/calendar-minimonth.js", lineNumber: 818, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "getItems@chrome://calendar/content/widgets/calendar-minimonth.js:818:18\nonLoad@chrome://calendar/content/widgets/calendar-minimonth.js:419:12\ngetInterfaceProxy/get/<@chrome://global/content/customElements.js:696:35\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///modules/CalCompositeCalendar.jsm:33:34\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:38:23\nnotify@resource:///modules/calendar/utils/calDataUtils.jsm:65:18\nonLoad@resource:///components/calCachedCalendar.js:77:23\n", location: XPCWrappedNative_NoHelper } calendar-minimonth.js:818 Calendar: [calICSService] Error in parser worker: [object Object] calICSService.js:588 Calendar: Error Parsing ICS: 2147500037 CalIcsParser.jsm:146 TypeError: obj is null 4 calCachedCalendar.js:921:9 Uncaught (in promise) Exception { name: "NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS", message: "[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]'[JavaScript Error: \"obj is null\" {file: \"resource:///components/calCachedCalendar.js\" line: 921}]' when calling method: [calICalendar::getItems]", result: 2153185313, filename: "resource:///modules/CalCompositeCalendar.jsm", lineNumber: 369, columnNumber: 0, data: XPCWrappedNative_NoHelper, stack: "start@resource:///modules/CalCompositeCalendar.jsm:369:24\n", location: XPCWrappedNative_NoHelper } 4 CalCompositeCalendar.jsm:369

I am using the Provider for Google Calendar addon, but have always had the problem that when I flag an item on a Google Task list as Completed then synchronise with Thunderbird, the completion flag stays unchanged in Thunderbird unless I've also done an edit to the task text, or unsubscribed/resubscribed the whole calendar. I was hoping that when Google Tasks got combined/integrated with calendar Reminders a few weeks ago, it might have meant I could uninstall the addon and use Tasks with native Thunderbird CalDAV, but that doesn't seem to be the case. By which I mean, if I uninstall the Provider and try to subscribe in Thunderbird, only my calendars are visible for selection, not my task lists.

Is there a way of exposing the task lists to Thunderbird other than with the Provider, so I can try a way which will sync correctly?

Hi, I have set-up 2 calendars for my 2 email addresses on Thunderbird email client with Provider for Google Calendar, and besides the invites, the calendars work well with 2 way sync, etc.

Problem is when I accept an email invite on Thunderbird from either account it automatically goes to one calendar and not the other and I can't find a way to get it to the proper calendar.

- One calendar is from MS Exchange/Outlook (synced with Thunderbird) where all invites go - One calendar is my Google/GMail calendar (synced with Thunderbird) where invitations do not go Interestingly on my Google Web version (Google Calendar site, not Thunderbird) the invites are properly allotted to the right calendars. So I am guessing it’s my Thunderbird setup.

Have attached 4 screenshots: - Calendars listed - Settings for the MS Exchange calendar - Settings for the Google calendar - Screen where I accept the invite. The invite is sent to the Gmail address and the response is the proper Gmail address. Also something odd about me "not being on the list" shows up whenever I accept from any account.

Any help is greatly appreciated!

Hi, I've searched a lot here and on other websites. I want to integrate the thunderbird calendar with the outlook.com calendar, not the Microsoft Outlook calendar. How to do so? I did publish the .ics file from outlook.com settings but do not know what to do now. Really lost. Please advice. Thanks Mohamed

I'm using an old, no longer supported add-on called Reminderfox that saves its contents in ics format. I used to be able to import this to Google calendar and Thunderbird but for some reason they and also Microsoft Outlook won't now import the ics file. They either give an error as in Thunderbird's case (error, no items to import) or just remain greyed out so I can't do anything else as in Google and Microsoft's case. I have submitted the ics file to an ics verifier online and it says there are no errors. I have also looked at the file in notepad and can't see any obvious errors, although I'm not fully conversant with the ics format. Can anyone suggest what the problem might be or anything else I can try please?

It's not on settings. I found this css code but don't know how one installs css for thunderbird. I got as far as opening the config editor on the calendar options. But I don't see what entry it is.

Alternatively if I can change the weekend colors that would work well. They are nearly the same yellow as the CURRENT color.

https://support.mozilla.org/en-US/questions/1304213

Thanks!

I followed the instructions here: https://support.mozilla.org/en-US/questions/1364439 After pasting in the URL of the Google Calendar from the browser, the process asks for the password used for the Google account. I provide the password, but the response is "The credentials you have entered were not accepted."

To confirm that the user name (my Gmail account) and password were entered correctly, I logged out of Calendar on the browser and logged in again using the credentials that were refused by the Create New Calendar process.

This isn't a showstopper, but it would be nice to have the calendar in Thunderbird.

Thunderbird 102.6.1, Windows 11

Over the last several updates to Tbird (can't say exactly when it started), my Google calendar seldom gets updated, and then seemly only at random times. The "synchronize calendars" command has no effect. A week or more can go by with no update, although my computer is always on and connected to the internet. Exiting and restarting Tbrird does not help. Eventually th calendar updates itself, unpredictably.

When I add an event to the Google calendar in Tbird, it shows up immediately in other instances of the Google calendar, such as on my phone. So we know that Tbird calendar is talking to Google, if only in one direction.

I didn't see this problem mentioned in any of the help articles. If others have reported this problem in the Community, I didn't find the thread. Any suggestions?

Hello. I wanted to ask you about the option of switching between calendars in thunderbird I have two gmail accounts and I mainly use one of them altogether with the calendar. Thunderbird automatically loaded the calendar from the other account. I tried to switch it by going to Edit - Calendar preferences - and marking the right calendar account but it still didn't work. How do I do it? I also change the language but somehow the actions don't apply. Is there an option how to save the changes I am making?

Sebastian

I just today (6/27/2023) downloaded and Installed Thunderbird on my Mac (latest OS installed).

I was able to successfully configure my Google account email and my company's Outlook/Exchange email just fine and I'm getting messages on both.

However, I do not see ANY calendar events whatsoever...not Apple (local) or Outlook.

I seem to be able to create an event on the calendar that's showing, but I'm getting nothing from Apple or Outlook.

I'm not so worried about local or Apple events, but I DO want to see my company's events that are on the Outlook Catalog.

Any ideas?

Thanks in advance!

Korky Kathman

Hi,

Please explain how to open SHARED Google calendars (that I do not own) in Thunderbird 102.4.0 on Win 11 Pro. Here is what I have tried:

(1) Added Google Provider add-in. Attempted to add my Google Calendars. It didn't find anything at all. (2) Removed Google Provider add in. Attempted to add my Google Calendars. It added the ones that I personally own just fine. However, it did not detect my husband's shared calendar to which I have view-only access. Interestingly, it DID add a shared calendar to which I have read/write access. (3) Restarted Thunderbird. Attempted #1 again. Attempted #2 again. (4) Restarted Thunderbird. Attempted #1 again. (5) Restarted Thunderbird. Attempted #2 again. (6) Restarted Thunderbird. Attempted #2. Then attempted #1. (7) No change in results. (8) Swore at the application multiple times. (9) Hit up these forums. Found that I am not the only one with this problem. Attempted to find solution. It was written in tech-ese and not English.

Please explain -- in English -- how to add view-only Google calendars, that I do not own and to which I do not have update access, to my new Thunderbird installation on my new computer. All I am trying to do is view my husband's calendar.

Thank you.

Hi everyone,

I'm having trouble adding Google Calendar to Thunderbird. I have added a Google account and all e-mails and some of the calendars have downloaded correctly.

The problem is that I can't see all the Google calendars from within Thunderbird.

In the Calendars section, I click on "+", select "Remote Calendars", enter my Google mail in the user name and I get an incomplete list of calendars (several are missing, including "Finanse", "Imieniny urodzinki", "ProgramyTV").

You can see the differences in the attached screenshots.

How do I correctly synchronize Thunderbird with Google Calendars so that all my calendars are visible? (I do not use any add-ons)

I am running Thunderbird on Linux, using version 91.4.1 (64-bit). My OS is set to use a 12 hour clock, yet all times in Thunderbird use a 24 hour clock. I checked out the help article, and it seemed to indicate having the locale set to English (United States) in preferences should get me the 12 hour clock, but both Application locale and Regional settings locale show that option. Switching does not change anything. I tried looking in the config editor, but I was unable to locate any of the settings to change time formats mentioned in the help article.

Why is Thunderbird stuck on a 24 hour clock?

The help article I tried: https://support.mozilla.org/en-US/kb/customize-date-time-formats-thunderbird

I am running TB 102.9.0 and use Provider for Google Calendar to sync my calendar with my other devices. Information that I receive from Google Calendar is correct, but any entry that I add to my computer has been shifting by one hour since daylight savings started. I have checked the timezone settings on my computer and in Google Calendar and all are correct. I tried deleting my Google Calendar subscription from TB and adding it back, but everything is still off by one hour. What more can I try?