Fatal error: Uncaught Error: Class "Sabre\DAV\Xml\XmlTest" not found in /var/www/illumine/vendor/sabre/dav/tests/Sabre/CardDAV/Xml/Property/SupportedCollationSetTest.php:8 Stack trace: #0 {main} thrown in /var/www/illumine/vendor/sabre/dav/tests/Sabre/CardDAV/Xml/Property/SupportedCollationSetTest.php on line 8