"Global Forecast Unavailable" – Scope Nights Astronomy Weather Review

No matter what location I try, whether my own, or any of their suggested spots, I get a message saying, "Global Forecast Unavailable For ..." Do I have to pay $2.99 for the United States Astronomy Weather in-app purchase before it will do anything? I'd like to try this app, but as is, it's no good.
Review by MoonSmiles on Scope Nights Astronomy Weather.