Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /home/tzuovhm/tzuovhm/apps_/files_sharing/lib/Middleware/SharingCheckMiddleware.php:30 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/files_sharing/lib/Middleware/SharingCheckMiddleware.php on line 30