Fatal error: Uncaught Error: Class 'JMS\Serializer\Annotation\XmlCollection' not found in /home/ffl2020/public_html/vendor/jms/serializer/src/Annotation/XmlList.php:12 Stack trace: #0 {main} thrown in /home/ffl2020/public_html/vendor/jms/serializer/src/Annotation/XmlList.php on line 12