Fatal error: Uncaught Error: Class "Wikimedia\Purtle\RdfWriterBase" not found in /var/www/html/orian-wiki/vendor/wikimedia/purtle/src/N3RdfWriterBase.php:11 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/vendor/wikimedia/purtle/src/N3RdfWriterBase.php on line 11