Fatal error: Uncaught Error: Class 'JMS\Serializer\AbstractVisitor' not found in /home/devilinf/maitres-couvreurs.fr/web_pool/marne-vitry-le-francois/vendor/jms/serializer/src/XmlSerializationVisitor.php:18 Stack trace: #0 {main} thrown in /home/devilinf/maitres-couvreurs.fr/web_pool/marne-vitry-le-francois/vendor/jms/serializer/src/XmlSerializationVisitor.php on line 18