Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /home/cgenial/sandbox.cgenial.org/vendor/knplabs/knp-menu-bundle/src/DependencyInjection/KnpMenuExtension.php:13 Stack trace: #0 {main} thrown in /home/cgenial/sandbox.cgenial.org/vendor/knplabs/knp-menu-bundle/src/DependencyInjection/KnpMenuExtension.php on line 13