Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpKernel\KernelInterface' not found in E:\xampp\htdocs\www\key2\vendor\symfony\http-kernel\Kernel.php:48 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\key2\vendor\symfony\http-kernel\Kernel.php on line 48