Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Resource\SelfCheckingResourceInterface" not found in /home/vincent/http/concrete5/concrete/vendor/symfony/config/Resource/ReflectionClassResource.php:17 Stack trace: #0 {main} thrown in /home/vincent/http/concrete5/concrete/vendor/symfony/config/Resource/ReflectionClassResource.php on line 17