Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Exception\HttpException" not found in C:\xampp\htdocs\mflux\vendor\symfony\http-kernel\Exception\LengthRequiredHttpException.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\mflux\vendor\symfony\http-kernel\Exception\LengthRequiredHttpException.php on line 17