K-9 Mail crashes right after "welcome screen"

Hi all,
since a few weeks the K-9 Mail App did not send/receive E-Mails anymore. For instance, that means that when I tried to send an email it appeared in the “outbox” folder, but was never sent.

I tried to fix it by uninstalling K9 and installing it again to version 6.802. Since then, after I am on the “welcome screen” and I click on the first button to set up the app, it crashes and closes.

I tried rebooting, deleting app data and cache of K9 app. And I tried installing many older versions of the app, but it still they crashed the same way. I also tried reinstalling the Android System WebView App (and also older versions), but nothing changed.

I am really stuck now and I would appreciate any help. I really love the app and would like to continue using it.

My device: Unihertz Titan Pocket, Android 11

Kind regards,

Please record a debug log and create a new issue on GitHub. See LoggingErrors · thunderbird/thunderbird-android Wiki · GitHub