Fatal error: Uncaught Error: Class 'JsonSchema\Exception\InvalidArgumentException' not found in /data/htmlwww/common/jpgraph/vendor/justinrainbow/json-schema/src/JsonSchema/Exception/UnresolvableJsonPointerException.php:17 Stack trace: #0 {main} thrown in /data/htmlwww/common/jpgraph/vendor/justinrainbow/json-schema/src/JsonSchema/Exception/UnresolvableJsonPointerException.php on line 17