Fatal error: Uncaught Error: Interface "Sabre\Xml\XmlSerializable" not found in /var/www/cal.digio.space/vendor/sabre/xml/lib/Element/Cdata.php:22 Stack trace: #0 {main} thrown in /var/www/cal.digio.space/vendor/sabre/xml/lib/Element/Cdata.php on line 22