Fatal error: Uncaught Error: Class "Wikimedia\Purtle\RdfWriterBase" not found in /var/www/html/orian-wiki/vendor/wikimedia/purtle/src/JsonLdRdfWriter.php:13 Stack trace: #0 {main} thrown in /var/www/html/orian-wiki/vendor/wikimedia/purtle/src/JsonLdRdfWriter.php on line 13