Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\KernelEvent' not found in C:\Landaweb\webs\serverarcos\vendor\symfony\http-kernel\Event\FinishRequestEvent.php:21 Stack trace: #0 {main} thrown in C:\Landaweb\webs\serverarcos\vendor\symfony\http-kernel\Event\FinishRequestEvent.php on line 21