Fatal error: Uncaught Error: Interface "Sabre\DAV\IFile" not found in /var/www/illumine/vendor/sabre/dav/lib/DAV/PartialUpdate/IPatchSupport.php:16 Stack trace: #0 {main} thrown in /var/www/illumine/vendor/sabre/dav/lib/DAV/PartialUpdate/IPatchSupport.php on line 16