I use StackTraceGPS. pinpoint to get the un-uglified stack but got error when stacktracegps starts to find my vendor code (REACT) from webpack.

Error:
Error: HTTP status: 0 retrieving webpack:///~/react/lib/ReactCompositeComponent.js at XMLHttpRequest.r.onreadystatechange

Webpack config: devtool: 'source-map', entry: './src/index', target: 'web', output: { path: __dirname + '/dist', // Note: Physical files are only output by the production build tasknpm run build`.
publicPath: '/myapp/',
filename: 'bundle.js'
},
devServer: {
contentBase: './dist'
},
plugins: [
new webpack.DefinePlugin(GLOBALS),
new webpack.optimize.UglifyJsPlugin({
compress: { warnings: false },
output: { comments: false },
sourceMap: true
}),
new BundleAnalyzerPlugin({analyzerMode: 'static', generateStatsFile: true, openAnalyzer: false}),
extractSass
],

`