Nextcloud 21 Upgrade: Cannot write into "config" directory!

[maxf]

Yep, that’s what I do, too.

@maxf

I finally got it working reliably by setting up a systemd timer executing a script at boot and, just to make sure, every 5 minutes afterwards, that does a chmod -R http:nextcloud and a chown -fR 770 on:
/var/lib/nextcloud
/etc/webapps/nextcloud/config
/usr/share/webapps/nextcloud
Maybe the 770 is overkill for some of the files, but I am in no mood to finetune any longer.