Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\FileLoader" not found in D:\xampp\htdocs\_runing\sales-manager-system\vendor\symfony\routing\Loader\XmlFileLoader.php:28 Stack trace: #0 {main} thrown in D:\xampp\htdocs\_runing\sales-manager-system\vendor\symfony\routing\Loader\XmlFileLoader.php on line 28