Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in /home/flighto/e-commerce/vendor/jms/serializer-bundle/Debug/DataCollector.php:15 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/jms/serializer-bundle/Debug/DataCollector.php on line 15