Hmm, very strange. Could you post any error output you get? Make sure you’ve copied all the files from here into your node_modules/react-native/Libraries/CustomComponents/ directory. It won’t work until you have them all, because several of them refer to one another. Once you’ve copied them, then run npm start (if you start it before copying, it won’t recognize the files).

Are you using your personal app or an example app? If you post a working demo I can also take a look at that.