Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\Normalizer\NormalizerInterface" not found in /home/fotonoma/public_html/wallabag/vendor/friendsofsymfony/rest-bundle/Serializer/Normalizer/FlattenExceptionNormalizer.php:24 Stack trace: #0 {main} thrown in /home/fotonoma/public_html/wallabag/vendor/friendsofsymfony/rest-bundle/Serializer/Normalizer/FlattenExceptionNormalizer.php on line 24