Fatal error: Uncaught Error: Interface "Sabre\Xml\XmlSerializable" not found in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CalDAV\Xml\Property\AllowedSharingModes.php:28 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CalDAV\Xml\Property\AllowedSharingModes.php on line 28