Hi,
When you're referencing the link to the chart you use, "newchart-xml-ID1". From my understanding of the documentation (http://www.fusioncha...arts.html#basic), this is technically wrong and should be "newchart-json-ID1". When I modified your code to use the json reference it stopped working like the OP.
Is the documentation wrong or is this a bug in the library?
With thanks