Fatal error: Uncaught Error: Interface "Sabre\Xml\XmlSerializable" not found in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CardDAV\Xml\Property\SupportedAddressData.php:25 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\dle\engine\classes\composer\vendor\sabre\dav\lib\CardDAV\Xml\Property\SupportedAddressData.php on line 25