Well the author! I don't know how to say with you, is like this, I don't have a Steam account is not in the Steam download Deadswitch 3, I just login in Deadswitch 3, but I open the login interface card for a while it suddenly shows server error, will stay in the attempt, I open it again is like just now, I have no Steam.
Is it possible your network is blocking access to the account server?
You can test it by visiting this URL: https://ds3acc-us.wilkingames.net