Fixed - an updated to Google Calendar addon was required

I have an issue that might be relayed:

Since upgrading TB to 78, when starting the program a window pops up asking me for my Google credentials "htts://google.com is requesting your username and password. The site says: Google APis".

However, I do not have TB linked to Google at all, neither to gmail nor gcalendar.

How can I get rid of this annoying message?

Thanks!

stkm04, when posting about your own issue, you should be creating a new topic via https://support.mozilla.org/en-US/questions/new/thunderbird

Sorry, Wayne! I thought since it might related I'd post it here.

Sorry, but what is the solution to this problem??

That answer 'Fixed - an updated to Google Calendar addon was required' does not help at all. Which addon must be updated?

Google calender addon - see tools->.addon

Provider for Google Calendar

Thanks! At first it looked like it was not compatible with the new Thunderbird.