Guys, please help how to fix this?
I did just upgrade of nextcloud to latest version and now it can’t be starded on Truenas Scale
I am having the same problem! The last update broke nextcloud.
looks like nextcloud has changed data structure of the user’s folder but I did try to check DEPRECATED option, still can’t start
Worse is that I can’t even roll back, whole bunch of errors appearing in logs if I do so. What to do next? 
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.46/containers/ix-nextcloud-postgres-1/json": dial unix /var/run/docker.sock: connect: permission denied
why docker user suddenly getting access denied?
Changed Postgres to version 17 instead of 13 and problem solved.
Where/how did you do this? (I am on latest electric eel if this matters)
edit:
Nevermind - found it: Apps - Nextcloud - “Edit” button and there is a dropdown selector for the postgres-Version. Selecting postgres 17 and restarting nextcloud + additional upgrade (and a restart of TrueNAS for good measure) soved the problem. All apps including nextcloud are up to date and running