Fatal error: Uncaught Error: Class "EasyRdf\Serialiser\Ntriples" not found in /var/www/html/vendor/sweetrdf/easyrdf/tests/EasyRdf/Serialiser/NtriplesArray.php:51 Stack trace: #0 {main} thrown in /var/www/html/vendor/sweetrdf/easyrdf/tests/EasyRdf/Serialiser/NtriplesArray.php on line 51