Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\KernelEvent" not found in /Applications/MAMP/htdocs/fislo/vendor/symfony/http-kernel/Event/ResponseEvent.php:27 Stack trace: #0 {main} thrown in /Applications/MAMP/htdocs/fislo/vendor/symfony/http-kernel/Event/ResponseEvent.php on line 27