Nextcloud is in maintenance mode

Nextcloud is in maintenance mode after updating nextcloud on ZImaOS.
The following text appears :
This Nextcloud instance is currently in maintenance mode, which may take a while. This page will refresh itself when the instance is available again.
Contact your system administrator if this message persists or appeared unexpectedly.

How can it be solved?
Please

have the same issue. any ideas how to restart the app?

If you guys are in our DC server, this might be helpful:

If not, please join through:
https://www.zimaboard.com/discord