I run into problem on page 22. It says the html page should be empty and I should open developer tools to find an empty h1-tag. My page is not empty and shows the original text ("I am about to learn the essentials of React.js.") from the index.html file. It hasn't been written over by app.js or anything.

If I run the downloaded code it works fine and shows three list items instead of the original text but I haven't gotten to the end yet. So I tried to copy the code from the example files (except for app.js and snapterest.js) and build again with gulp. I still get the same result. Gulp finishes and I can see the snapterest file is updated. The only difference I can find now is in the versions of babelify and browserify in packages.json. I tried changing them as well and build again. Still no change.

So React doesn't even kick in....