How to convert xml to image base 64

[vanthuc1912]

When exporting XML to the browser, the error does not display the icon as above

diagram = mxUtils.parseXml(xmlDiagram2);
codec = new mxCodec(diagram);

codec.decode(diagram.documentElement, graph.getModel());
graph.view.scale = 1.0;
graph.fit();

Icon aws error

Expect