Fatal error: Uncaught Error: Class "OCP\AppFramework\Controller" not found in /users/ms-it/www/oc/apps-external/richdocuments/lib/Controller/DocumentController.php:36 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/apps-external/richdocuments/lib/Controller/DocumentController.php on line 36