Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Event\KernelEvent" not found in /usr/www/unityweb/public/hms/vendor/symfony/http-kernel/Event/FinishRequestEvent.php:22 Stack trace: #0 {main} thrown in /usr/www/unityweb/public/hms/vendor/symfony/http-kernel/Event/FinishRequestEvent.php on line 22