@DanScharon, thanks for pointing it out.
I am still having trouble recovering my nextcloud install: a couple of questions I hope could point me in the right direction:
-
I am not sure when the error occurred: during the first (18.0.4.2-> 18.0.8.2) or the second (18.0.8.2-> 19.0.2) upgrade, so I am not sure which config.php backup to restore from
<data-dir>/updater-<instance-id>/backupsfolder. -
What if I already completed the upgrade via web-gui as I could not be aware that the config was empty? I mean when it restarts the instance and you get to the blue screen saying
App Upgrade required
[List of apps]
[Start Update Button]
To avoid timeouts with larger installations, you can instead run the following command from your installation directory:
./occ upgrade
- In case I have left no other options than a full restore: does the web-gui updater make a backup of the database, too? Where can I find it?
Thanks again to everybody for the help.