Fatal error: Uncaught Error: Class "RemexHtml\Serializer\Serializer" not found in /var/www/html/orian-wiki/vendor/wikimedia/remex-html/RemexHtml/Serializer/SerializerWithTracer.php:9 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/vendor/wikimedia/remex-html/RemexHtml/Serializer/SerializerWithTracer.php on line 9