Users that have had this issue have reported having two network cards in their PC and disabling one of them has fixed the issue. Other users reported the software Hamachi to be the cause of the problem, since it creates a second virtual network card.
To solve this problem there are only 3 options:
1) Try to download and play the game through Steam
2) Use another internet connection, it’s very likely your internet connection to cause the problem
3) Wait for when our launcher will implement the torrent protocol. This, unfortunately, will not happen any time soon.