I can’t remember tbh. I specifically for this one though that struggles, went back, got the original notebook, and updated only inside the regions, that they expect the updates, and it still struggles, while all the unit tests pass..
One thing that I noticed is that there is minor difference on the paths of the data, on the expected output of the markdown vs the code, although Unit tests are set correctly.
Not sure though if this affects the actual grader..
After looking at your Exercise 1, the issue is, you are hardcoding the root paths for the training and validation dataset, instead of using the function variables train_path and val_path.
Since, you hardcoded the paths, and they exist in the assignment environment, everything works, but those path do not exist in the autograder’s environment, which is why you get the error.