Nextcloud or one of the apps require upgrade user not found

Access to nextcloud contacts and calendar got blocked by upgrade message:

App update required

Please make sure that the database, the config folder and the data folder have been backed up before proceeding.

Tried to activate admin access to nextcloud but got the following message:

I am going to unlock admin features for
You can provide another user to unlock as the first argument of this script.

WARNING: you could break mail-in-a-box when fiddling around with Nextcloud’s admin interface
If in doubt, press CTRL-C to cancel.

Press enter to continue.

Nextcloud or one of the apps require upgrade - only a limited number of commands are available
You may use your browser or the occ upgrade command to do the upgrade
user not found.

Do I have to wait for MIAB to be updated or is there some other way