This is not a support question. I just want to inform, that I’m very bugged about the update function of oc. Since years (oc 8) it never was possible to update the oc by the internal updater. It allways crashed.
The manually way like explained here: https://doc.owncloud.org/server/9.1/admin_manual/maintenance/upgrade.html where it’s told to keep /data and /config and overwrite all other files, does not work either. The oc changed to maintenance mode and never woke up again.
Other ways are not possible for me due to the fact, that I run oc on an ordinary hosting package.
When ever I want to update I have to make a clean install. That’s why I update oc very rarely.
What a pity.