Fatal error: Uncaught Error: Class "JMS\Serializer\AbstractVisitor" not found in C:\laragon\www\clientxcms\vendor\jms\serializer\src\XmlSerializationVisitor.php:19 Stack trace: #0 {main} thrown in C:\laragon\www\clientxcms\vendor\jms\serializer\src\XmlSerializationVisitor.php on line 19