Webpack 3 stats.json won't upload.

[stephan-v]

I am currently getting this error message:

Uncaught TypeError: Cannot read property '0' of undefined
    at getTreeFromStats (App.js:50)
    at FileReader.App.handleFileLoad

I think it has to do with the formatting of the .json file being different for Webpack 3 which I am running?

There is a similar message on the official webpack visualizer's issue page:

webpack/analyse#30

[slavafomin]

Make sure that you generate the stats.json file with modules property set to true, otherwise it will not contain it and will cause the issue with most tools. Be advised, that verbose preset IS NOT including the modules field, despite what the documentation says.

Here's some more details: webpack/webpack#9392