If you run the notebooks locally, you need all the files, not just the notebook. Here’s a thread about how to download all the files, but that’s also only the start. Then you need exactly the same versions of all the various packages that are used. There is no easy or “official” way to accomplish that, but here is a thread that gets you started down that road. There are too many possibilities for us to support you in that: you’ll need to figure it out yourself.
You’re really better off just running the assignments on the course website.