Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\ParameterBag" not found in C:\xampp\htdocs\adminlte3\vendor\symfony\http-foundation\InputBag 2.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\adminlte3\vendor\symfony\http-foundation\InputBag 2.php on line 21