Fatal error: Uncaught Error: Interface "Sabre\DAV\PartialUpdate\IPatchSupport" not found in /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php:7 Stack trace: #0 {main} thrown in /var/www/illumine/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php on line 7