There are some breaking changes in Redux v4 that needs to be adressed here.

Using the 4.0.0-beta.1 release results in the following error:

Uncaught TypeError: Cannot read property 'state' of undefined
    at unliftState (instrument.js:579)

It is caused by this change which appends a random string to the initial redux action type. But here in the store enhancher we assume that the inital action is called @@redux/INIT