Fatal error: Uncaught Error: Interface "OCP\Mail\Provider\IManager" not found in /home/tzuovhm/tzuovhm/nextcloud/lib/private/Mail/Provider/Manager.php:19 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/lib/private/Mail/Provider/Manager.php on line 19