Fatal error: Uncaught Error: Class 'Symfony\Component\Routing\Loader\ObjectLoader' not found in C:\xampp73\htdocs\web\vendor\symfony\routing\Loader\ContainerLoader.php:21 Stack trace: #0 {main} thrown in C:\xampp73\htdocs\web\vendor\symfony\routing\Loader\ContainerLoader.php on line 21