[Users] imap_item_get_path: assertion 'folder_path != NULL' failed

[Olaf]

Hello!

For the move to a new PC I copied the ~/.claws-mail from the old Ubuntu 14.04 to the new Lubuntu 22.04. When trying to start claws-mail I get the message (start in terminal):

(claws-mail:338439): Claws-Mail-CRITICAL **: 23:01:43.898:
imap_item_get_path: assertion 'folder_path != NULL' failed
Speicherzugriffsfehler (Speicherabzug geschrieben)

In a test with Bodhi-Linux as the new system, claws-mail worked perfectly after copying.

I did find a post from 2017 on the above error, but I don't understand what to do:

https://lists.claws-mail.org/pipermail/users/2017-August/019977.html

with the reference to

https://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3855

Apparently I need to change something in a file (which I can't find)?
Shouldn't the bug from 2017 have been fixed in the sources by now?

Greeting,
Olaf