Fatal error: Uncaught Error: Class "OC\Files\Storage\Wrapper\PermissionsMask" not found in /var/www/html/nextcloud/apps/files_external/lib/Lib/SessionStorageWrapper.php:15 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/files_external/lib/Lib/SessionStorageWrapper.php on line 15