Fatal error: Uncaught Error: Class 'JMS\Serializer\Annotation\XmlCollection' not found in /home/itscm/dev.its.cm/webserivesits/vendor/jms/serializer/src/Annotation/XmlMap.php:11 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/webserivesits/vendor/jms/serializer/src/Annotation/XmlMap.php on line 11