Fatal error: Uncaught Error: Class "OCP\AppFramework\Controller" not found in /home/tzuovhm/tzuovhm/apps_/richdocuments/lib/Controller/DocumentController.php:42 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/richdocuments/lib/Controller/DocumentController.php on line 42