Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Event\KernelEvent' not found in G:\projects\stage.api.edutalk.edu.vn\vendor\symfony\http-kernel\Event\ResponseEvent.php:27 Stack trace: #0 {main} thrown in G:\projects\stage.api.edutalk.edu.vn\vendor\symfony\http-kernel\Event\ResponseEvent.php on line 27