Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in /home/fotonoma/public_html/wallabag/vendor/liip/theme-bundle/DependencyInjection/Configuration.php:28 Stack trace: #0 {main} thrown in /home/fotonoma/public_html/wallabag/vendor/liip/theme-bundle/DependencyInjection/Configuration.php on line 28