PHP Version - Wartungsmodus

Hello everyone (verstehe auch Deutsch als Antwort)

First of all, I couldn’t log in because I had a new PHP-Version and I didn’t update the nextcloud account.
Then I put the old PHP version EOL-5.6 and then I could sign in again.
Then I tried to update the new version of nextcloud, but that was not possible.
I stayed log in and I updated the PHP Version 7.4 and then I could update nextcloud.
After that I tried to update my page, but there was only the message:
“This version of Nextcloud is not comatible with > PHP 7.3.
You are currently running 7.4.5.”
So I changed the PHP Version to 7.3 and went bach to nextcloud.
Now there was a new message on german:
“Diese Nextcloud-Instanz befindet sich gerade im Wartungsmodus, was eine Weile dauern kann.
Diese Seite aktualisiert sich automatisch, wenn die Nextcloud-Instanz wieder verfügbar ist.
Kontaktiere den Systemadministrator, wenn diese Meldung dauerhaft oder unerwartet erscheint.
Vielen Dank für Deine Geduld.”
I waited now over 24 hours, but there ist still this message.

Now my quastion, can you help me?
What ist the problem?

Tanks for your answer.

Kind regards

Can you specify which versions of Nextcloud you are using and to which version you upgraded?

Is this your server or do you have access via ssh terminal (rarely on hosted environments)? This is easier for updates and debugging.