Hi Daniel, sorry you’re experiencing this error. I’m planning to write a more up to date tutorial as it’s gotten easier to do this. If you just want a simple react and typescript setup I recommend you check out create-react-app and follow this to add typescript https://facebook.github.io/create-react-app/docs/adding-typescript

If you would just like to get your error fixed please share your full webpack file maybe in a gist on GitHub. It’s easier to debug that way.