Pie chart widget erroring

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I am trying to use the Mendix created Chart widget and get the following error when I try to setup a pie chart Converting circular structure to JSON --> starting at object with constructor 'HTMLDivElement' | property '__reactInternalInstance$9uot1rzhb96' -> object with constructor 'Kn' --- property 'stateNode' closes the circle TypeError: Converting circular structure to JSON --> starting at object with constructor 'HTMLDivElement' | property '__reactInternalInstance$9uot1rzhb96' -> object with constructor 'Kn' --- property 'stateNode' closes the circle at JSON.stringify (<anonymous>) at http://localhost:8080/mxclientsystem/mxui/mxui.js?637001824125804575:51:221644 at Array.map (<anonymous>) at e.log (http://localhost:8080/mxclientsystem/mxui/mxui.js?637001824125804575:51:221554) at http://localhost:8080/mxclientsystem/mxui/mxui.js?637001824125804575:51:252782 at http://localhost:8080/mxclientsystem/mxui/mxui.js?637001824125804575:51:223120 at Array.forEach (<anonymous>) at e.log (http://localhost:8080/mxclientsystem/mxui/mxui.js?637001824125804575:51:223091) at e.debug (http://localhost:8080/mxclientsystem/mxui/mxui.js?637001824125804575:51:222432) at e.renderChart (http://localhost:8080/widgets/com/mendix/widget/custom/PieChart/PieChart.js?637001824125804575:12:98100) A quick google and there is nothing obvious about this error, I am guessing it may be a conflict with another library but still, unsure. I have setup the required properties: entity, name, value, color.  
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1 answers
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Hi Harry conibre i think its json.stringify error , you can try like this 

 

// Demo: Circular reference
var o = {};
o.o = o;

// Note: cache should not be re-used by repeated calls to JSON.stringify.
var cache = [];
JSON.stringify(o, function(key, value) {
    if (typeof value === 'object' && value !== null) {
        if (cache.indexOf(value) !== -1) {
            // Duplicate reference found, discard key
            return;
        }
        // Store value in our collection
        cache.push(value);
    }
    return value;
});
cache = null;
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