Fatal error: Uncaught Error: Interface 'JMS\Serializer\EventDispatcher\EventSubscriberInterface' not found in /home/users/00/3c/21/home/www/vendor/jms/serializer-bundle/Serializer/StopwatchEventSubscriber.php:12 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/jms/serializer-bundle/Serializer/StopwatchEventSubscriber.php on line 12