Kmail Gmail Account access to one account fails after reboot

One Kmail IMAP access of a Gmail account fails with a message telling me

“Password cannot be read. The user denied access to the password safe”

Which is certainly not true, a second gmail account doesn’t have the problem - recreating the account in Kmail doesn’t help.

Also I added this account in Kmail online accounts but that also has no effect.

How to fix that - I just want gmail to access kwallet properly like all other accounts do without problems…

The athentication methods and passwords are all correct (and work with my second gmail account…)

Any help?


p.s.: How do I give this account permission to access kwallet?
Is there a configuration file for it?