Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in /home/fotonoma/public_html/wallabag/vendor/kphoen/rulerz-bundle/DependencyInjection/Configuration.php:11 Stack trace: #0 {main} thrown in /home/fotonoma/public_html/wallabag/vendor/kphoen/rulerz-bundle/DependencyInjection/Configuration.php on line 11