Alfredworkflow.com is not officially tied to Alfred, so any resolution would need to come from it’s creator, hzlzh. You can contact him via the forums, or by opening a pull request on the website’s repository.
That said, you shouldn’t need anything special to download such link, and just trying it, it worked without a hitch. It shouldn’t make a difference, but does this link work?
On a final note, also take a look at packal. It’s featured on the forum, giving it some official support (even though it’s not maintained by Alfred’s creators). There’s also a workflow to search it.
Fair enough. After playing around with Alfred a while and reading up on various workflow ideas people have implemented, I may just go ahead and by the Powerpack.