Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /var/www/html/nextcloud/apps/files_sharing/lib/Middleware/SharingCheckMiddleware.php:30 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/files_sharing/lib/Middleware/SharingCheckMiddleware.php on line 30