Thunderbird :: Stuck at Google sign-in

I had asked the same question today and got this answer:

https://askubuntu.com/a/910630/621017

It worked for me, but I had to reboot after uninstalling and only then reinstalled TB.

Alternate Workaround:

If anyone needs a workaround for any reason as I did, here is one option to consider to get your gmail working in Thunderbird without the patch or beta release.

First in your gmail account you will need to have “Allow less secure apps” turned on. You can always turn this back off when you have OAuth working again. Google tool screenshot

Next, In Thunderbird > account settings > server settings > Change the Authentication method from “OAuth” to “Normal Password”. Auth setting screenshot

Last change the SMTP server settings to normal as well (to be able to send out email).

This got me back into my email when I can’t get the latest patch for Thunderbird easily.