Fatal error: Uncaught Error: Interface "Wikimedia\RemexHtml\Serializer\AbstractSerializer" not found in /var/www/html/orian-wiki/vendor/wikimedia/remex-html/src/DOM/DOMSerializer.php:16 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/vendor/wikimedia/remex-html/src/DOM/DOMSerializer.php on line 16