Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpKernel\HttpKernelInterface' not found in C:\xampp\htdocs\dpbb\vendor\symfony\http-kernel\HttpKernel.php:52 Stack trace: #0 {main} thrown in C:\xampp\htdocs\dpbb\vendor\symfony\http-kernel\HttpKernel.php on line 52