Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /users/ms-it/www/oc/apps/files_sharing/lib/Middleware/SharingCheckMiddleware.php:41 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/apps/files_sharing/lib/Middleware/SharingCheckMiddleware.php on line 41