Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Loader\FileLoader' not found in C:\xampp\htdocs\admin\vendor\symfony\routing\Loader\YamlFileLoader.php:30 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\routing\Loader\YamlFileLoader.php on line 30