Fatal error: Uncaught Error: Interface 'JsonSchema\UriRetrieverInterface' not found in /data/htmlwww/common/jpgraph/vendor/justinrainbow/json-schema/src/JsonSchema/Uri/UriRetriever.php:25 Stack trace: #0 {main} thrown in /data/htmlwww/common/jpgraph/vendor/justinrainbow/json-schema/src/JsonSchema/Uri/UriRetriever.php on line 25