Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was closed and archived. Please ask a new question if you need help.

Worrying looking warning messages

  • 2 replies
  • 0 have this problem
  • 21 views
  • Last reply by SuMo Bot

more options

I am on ubuntu 22.04 and thunderbird 102.4.0

When I run thunderbird I see a number of warnings in the console. The following line appears many times:

console.warn: Calendar: Message: Error: Property X-ALT-DESC not set


and then I see:

console.error: WebExtensions:

 Message: TypeError: item is null
 Stack:
   deleteItem@resource:///modules/CalStorageCalendar.jsm:362:9

syncEvents@jar:file:///home/user/.thunderbird/9orv369p.default-release/extensions/owl@beonex.com.xpi!/webapi/calendar/calendar.js:833:36


Are these anything to worry about?

I am on ubuntu 22.04 and thunderbird 102.4.0 When I run thunderbird I see a number of warnings in the console. The following line appears many times: console.warn: Calendar: Message: Error: Property X-ALT-DESC not set and then I see: console.error: WebExtensions: Message: TypeError: item is null Stack: deleteItem@resource:///modules/CalStorageCalendar.jsm:362:9 syncEvents@jar:file:///home/user/.thunderbird/9orv369p.default-release/extensions/owl@beonex.com.xpi!/webapi/calendar/calendar.js:833:36 Are these anything to worry about?

Chosen solution

In short, no:

  • "-ALT-DESC not set" is just a warning
  • "item is null" happens during sync of the calendar, we try to delete a calendar item that no longer exists. So, that doesn't seem like a problem. Just the error message should be supressed probably.
Read this answer in context 👍 0

All Replies (3)

more options

Chosen Solution

In short, no:

  • "-ALT-DESC not set" is just a warning
  • "item is null" happens during sync of the calendar, we try to delete a calendar item that no longer exists. So, that doesn't seem like a problem. Just the error message should be supressed probably.
more options

Thanks for the reply!

more options

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.