Upgrade fail, cannot log on anymore

Message is "OC\RepairException: Upgrade is not possible." due to integrity check. But I cannot get the logon screen anymore.

How can i get out of this update mode?


try this

sudo -u www-data php occ maintenance:mode --off

Thanks voroyam for this quick respond, but I don't have access to terminal on this server.

Anyway, my config.php says 'maintenance' => false,