Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\Loader" not found in D:\Apache24\www\sciegen\backend\vendor\symfony\routing\Loader\ClosureLoader.php:24 Stack trace: #0 {main} thrown in D:\Apache24\www\sciegen\backend\vendor\symfony\routing\Loader\ClosureLoader.php on line 24