Fatal error: Uncaught Error: Interface "Sabre\Xml\XmlSerializable" not found in C:\laragon\www\baikal\vendor\sabre\dav\lib\CalDAV\Xml\Property\SupportedCollationSet.php:24 Stack trace: #0 {main} thrown in C:\laragon\www\baikal\vendor\sabre\dav\lib\CalDAV\Xml\Property\SupportedCollationSet.php on line 24