Fatal error: Uncaught Error: Class "Sabre\CardDAV\AbstractPluginTest" not found in /var/www/illumine/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php:7 Stack trace: #0 {main} thrown in /var/www/illumine/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php on line 7