Dynamic page loading failed Error: Cannot find module "react/addons"

Anyone have idea of this issue?

Using ES6: `import { ScrollbarWrapper } from 'react-scrollbars';`,
Installed  `react-addons-test-utils`,
Installed `react-addons`,
Updated in webpack config:
```
webpack: {
  ...
  externals: {
      ...
      'react/addons': true,
   },
},
```
Still no luck :(
