Thanks for this info Goran!
I does seem, though, like it will work if you just try again later without changing anything. This is strange, but that is how it has been for all the ones (6-8 people) I heard about having this problem. It sounds like some kind of glitch in the connection or something – maybe at our end.
We are looking into why this happens. But at least it seems to be possible to overcome for now with a little patience.