Fatal error: Uncaught Error: Interface "OCP\Activity\IFilter" not found in /home/tzuovhm/tzuovhm/nextcloud/apps/activity/lib/Filter/SelfFilter.php:13 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/apps/activity/lib/Filter/SelfFilter.php on line 13