Decrypt Error PHP Fatal error

Today I have try to decrypt my files. But I get this message:

Nextcloud is in maintenance mode - no app have been loaded
Disable server side encryption... done.

You are about to start to decrypt all files stored in your Nextcloud.
It will depend on the encryption module and your setup if this is possible.
Depending on the number and size of your files this can take some time
Please make sure that no user access his files during this process!

Do you really want to continue? (y/n) y
prepare encryption modules...

 Fetch list of users... finished

 decrypt files for user Anja (1 of 2): /Anja/files/Photos/Paris.jpg
 [-->-------------------------]PHP Fatal error:  Call to a member function getContainer() on a non-object in /var/www/vhosts/ on line 127

Any idea?

Do you use external storages?

Only at my account, not the other “Anja” but now all data corrupt. I make an restore of the files.