Fatal error: Uncaught Error: Class "EasyRdf\RdfNamespace" not found in /var/www/html/vendor/sweetrdf/easyrdf/lib/TypeMapper.php:96 Stack trace: #0 /var/www/html/vendor/sweetrdf/easyrdf/lib/TypeMapper.php(160): EasyRdf\TypeMapper::set() #1 {main} thrown in /var/www/html/vendor/sweetrdf/easyrdf/lib/TypeMapper.php on line 96