Fatal error: Uncaught Error: Class 'Sabre\VObject\ITip\BrokerTester' not found in /home/malert/WebDAV/vendor/sabre/vobject/tests/VObject/ITip/BrokerProcessMessageTest.php:5 Stack trace: #0 {main} thrown in /home/malert/WebDAV/vendor/sabre/vobject/tests/VObject/ITip/BrokerProcessMessageTest.php on line 5