Fatal error: Uncaught Error: Interface "OCP\Collaboration\Reference\IReference" not found in /home/tzuovhm/tzuovhm/nextcloud/lib/public/Collaboration/Reference/Reference.php:16 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/lib/public/Collaboration/Reference/Reference.php on line 16