Fatal error: Uncaught Error: Interface "Wikimedia\Purtle\RdfWriter" not found in /var/www/html/orian-wiki/vendor/wikimedia/purtle/src/RdfWriterBase.php:19 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/vendor/wikimedia/purtle/src/RdfWriterBase.php on line 19