Does https://bugzilla.mozilla.org/show_bug.cgi?id=1977514#c8 help??

Hello there

Can you try to solve the problem with starting up in trouble shoot mode from thunderbird and use their good functions .

https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbird

If you cannot access direct into the Thunderbird program try use the other methods. You can login into that thunderbird safe mode option then by by closing thunderbird it s complete program and trying to enter this mentioned text into that pc. Go to that Windows systems command prompt line or let s call it the command prompt. Type that text into that Windows/system prompt and type enter.

Type: thunderbird -safe-mode

Troubleshoot Mode will temporarily disable your add-ons and themes, allowing you to see if the problem is resolved. If it works, the issue is likely with an add-on or theme that you'll need to disable or remove

Can you respond back if you can. After using troubleshoot mode?

Greetings googlethunderbird.

Thanks for your replies. The bug site didn't help, nor starting in trouble shooting mode. I consulted with a pro, who installed 143 beta for me, and that is working.