Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\ConfigurableExtension" not found in /home/flighto/e-commerce/vendor/jms/serializer-bundle/DependencyInjection/JMSSerializerExtension.php:26 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/jms/serializer-bundle/DependencyInjection/JMSSerializerExtension.php on line 26