Same here. I"m on the west coast of the US and cannot sign in. At first the launcher would not load but would display a crash notice saying it couldn't reach the server. After a reboot the launcher finally came up after a long load time, but I still can not log in. I just get a "Unexpected Response From Server: Service Unavailable" message at the password dialog box.
*Update* Now the launcher loads very quickly but I still cannot log in. The Dialog box now says "Unexpected response from server: Internal Server Error"
Yeah I'm having issues as well. Launcher couldn't connect first attempt. Second attempt it prompted me to redeem my game code, then told me the game required an update. Last time I played was last night.
I'm in the US, and I get the wrong launcher from Steam, the one that has the Login, Register or Demo Game buttons. Neither Login nor Register does anything but give the Unexpected Response from Server: Server Unavailable error. Why isn't FDev responding to this thread?
I think this happened once before. JSON Primitive seems to be some kind of operative that gets his fingers in where they're not supposed to be. I'll have a chat with his mom about this.