Fatal error: Class 'Symfony\Component\HttpKernel\Event\KernelEvent' not found in /var/www/html/dev/spa/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Event/GetResponseEvent.php on line 28

Call Stack:
    0.0002     236344   1. {main}() /var/www/html/dev/spa/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Event/GetResponseEvent.php:0