That is just the method to download the files. The other type of problems you can have besides not having all the files is having the wrong versions of some of the packages. The assignments are using the versions of everything that were current in April 2021 (2 years ago essentially) and incompatible changes can occur in that amount of time. There are no official instructions for how to deal with that. You have two fundamental choices:
- You can just debug each problem and then fix it.
- You can duplicate the versions used by the course in your private environment.
Neither of those paths is simple or easy. Here’s a thread that will get you started down the path of duplicating the versions.
Well, there is a third path, which is what Tom has already suggested earlier on this thread: use the course environment that is provided for you and “just works”. 
We are here to help you with the course material and are not paid to do this. That means we have the choice of whether we want to spend our (unpaid) time being your volunteer personal IT support staff for whatever you want to do outside the scope of these courses. The hint here is that if you want to play this type of game, then the best choice is to develop your own “chops” for how to deal with this sort of issue. If you’re going to be swimming in these waters in the longer term, this type of issue just keeps coming up and the sooner you build up your own debugging and analysis skills for solving them the happier you will be.