Fatal error: Uncaught Error: Class "JMS\Serializer\Annotation\XmlCollection" not found in /home/activeexcavators/public_html/vendor/jms/serializer/src/Annotation/XmlMap.php:12 Stack trace: #0 {main} thrown in /home/activeexcavators/public_html/vendor/jms/serializer/src/Annotation/XmlMap.php on line 12