Downloading captions always returns a 403

Question

When I call the captions.download endpoint with an ID that we retrieve from the captions.list endpoint, it always returns a 403. For example:

Answer 1

Status 403 Forbidden means that nobody has the right to access that URL. You shouldn't receive that message if you have the wrong API key, for example; that should give Status 401 Unauthorised. I'd check the URL carefully.