Works. Thank you very much!
That was quick 
Btw I also found what I was looking for: A user freshly created in Immich (logged in for the first time via OAuth) couldn't upload files. immich-admin list-users showed quotaSizeInBytes: 0 for them. Which is correct behaviour according to:
cat /run/immich.json
...
"oauth": {
...
"defaultStorageQuota": 0,
...
Looking at the current default immich.json it shoud be "defaultStorageQuota": null.
Is starting with no quota intended behaviour for Immich on Cloudron? I just can't remember if I used the admin to set a quota manually on previously generated users.

