Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Loader\LoaderInterface" not found in /home/vincent/http/concrete5/concrete/vendor/symfony/routing/Loader/AnnotationClassLoader.php:57 Stack trace: #0 {main} thrown in /home/vincent/http/concrete5/concrete/vendor/symfony/routing/Loader/AnnotationClassLoader.php on line 57