Fatal error: Uncaught Error: Class "Sabre\DAV\ServerPlugin" not found in /home/tzuovhm/tzuovhm/apps_/dav/lib/BulkUpload/BulkUploadPlugin.php:19 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/dav/lib/BulkUpload/BulkUploadPlugin.php on line 19