Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\KernelEvent' not found in /home/bienalsurweb/public_html/convocatoria2021/vendor/symfony/http-kernel/Event/GetResponseEvent.php:19 Stack trace: #0 {main} thrown in /home/bienalsurweb/public_html/convocatoria2021/vendor/symfony/http-kernel/Event/GetResponseEvent.php on line 19