State is undefined from codesandbox example (react instantsearch)

Hi guys,

I am trying to implement Algolia to my project and when I followed up the video tutorial (React instantsearch), almost everything worked just fine. However I want to implement multiple filters, range sliders and so on, so I was looking for a good example and I found this one ->

First of all, I tried to copy the whole example and just run it, but “this.state” is undefined and I can’t solve this particular problem. Does anyone know what’s the matter?

Thanks in advance.