Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Loader\DelegatingLoader' not found in C:\Landaweb\webs\landaweb\backend\vendor\symfony\framework-bundle\Routing\DelegatingLoader.php:29 Stack trace: #0 {main} thrown in C:\Landaweb\webs\landaweb\backend\vendor\symfony\framework-bundle\Routing\DelegatingLoader.php on line 29