Fatal error: Uncaught Error: Interface 'JMS\Serializer\EventDispatcher\EventSubscriberInterface' not found in /home/ffl2020/public_html/vendor/jms/serializer/src/EventDispatcher/Subscriber/DoctrineProxySubscriber.php:17 Stack trace: #0 {main} thrown in /home/ffl2020/public_html/vendor/jms/serializer/src/EventDispatcher/Subscriber/DoctrineProxySubscriber.php on line 17