Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in /home/flighto/e-commerce/vendor/sonata-project/block-bundle/src/DependencyInjection/SonataBlockExtension.php:29 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sonata-project/block-bundle/src/DependencyInjection/SonataBlockExtension.php on line 29