Fatal error: Uncaught Error: Interface "rdfInterface\QuadIteratorInterface" not found in /var/www/html/vendor/sweetrdf/rdf-helpers/src/rdfHelpers/GenericQuadIterator.php:40 Stack trace: #0 {main} thrown in /var/www/html/vendor/sweetrdf/rdf-helpers/src/rdfHelpers/GenericQuadIterator.php on line 40