Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\Loader" not found in /home/leathr/event.lea.therasse.mmi-velizy.fr/mmievent3/vendor/symfony/config/Loader/DelegatingLoader.php:24 Stack trace: #0 {main} thrown in /home/leathr/event.lea.therasse.mmi-velizy.fr/mmievent3/vendor/symfony/config/Loader/DelegatingLoader.php on line 24