You are a better man than I! Indeed those steps fixed it for me as well., well done. I’m also not sure what it should do at this point, as @sublimeartistry said earlier its possible this is only the api to access the parts repository and it won’t actually do anything (other than pass the tests) until the parts viewer repro is ready. Hopefully one of the developers may comment.
Edit: From the status 404 that we are both getting, I think there is a bad url to the repository and we aren’t getting the connection that we should (at least completely although it says all tests passed).
Peter