I installed evolution mail, and things were working for a few days. I restarted my computer today and now all my mail/calendars do not connect. I get error messages saying things like:

Failed to connected "myemail@gmail.com"
The session does not exist

Error while performing operation.
Failed to authenticate:: The session does not exist

And similar messages. I couldn't figured it out. So I deleted all the evolution config files in .cache/evolution and .config/evolution and .local/share/evolution.

I then re-added one of my gmail accounts. And same messages/errors.

What happened? And how can I fix it?

I'm on kubunut 20.04.01 and everything is updated. And passwords or anything else have not changed.