Fatal error: Uncaught Error: Class "OCA\Files_Sharing\ShareBackend\File" not found in /users/ms-it/www/oc/apps/files_sharing/lib/ShareBackend/Folder.php:31 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/apps/files_sharing/lib/ShareBackend/Folder.php on line 31