Hi I finaly was able to see the logs and this error keeps ongoing.
I googled it and found some threads with I thought similar issues but now Iam not sure anymore if this is the same issue at all.
I just shutdown my Nextcloud because of the massive error log which increases by every minute.
So I dont know what to do about this one at all. And figured its best not to leave Nextcloud running for now sadly. My Browser laggs/freezes when viewing the logs…