Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\ConfigurableExtension' not found in /home/lafaamicps/www/symfony/vendor/jms/serializer-bundle/JMS/SerializerBundle/DependencyInjection/JMSSerializerExtension.php:29 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/jms/serializer-bundle/JMS/SerializerBundle/DependencyInjection/JMSSerializerExtension.php on line 29