Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\ParameterBag" not found in D:\xampp\htdocs\_runing\sales-manager-system\vendor\symfony\http-foundation\ServerBag.php:21 Stack trace: #0 {main} thrown in D:\xampp\htdocs\_runing\sales-manager-system\vendor\symfony\http-foundation\ServerBag.php on line 21