Ok. This is very odd. After running without any issues whatsoever the launcher suddenly fails to connect and asks me if I have internet. I do. Every other program I tried works perfectly fine. I also followed the suggestions to add rules to the firewall, to no avail. Disabling the firewall gives no results either.
Yeah I am getting the same issue here. Don’t know why. if anyone has some info on this… would be appreciated to know whats happening. Thanks 
Edit: I can still use it in offline mode. but its just a minor issue I don’t really want. as I wouldn’t want to miss out on marketplace access.
Possible server down perhaps?
ahh yeah maybe. such a logical answer that didn’t come to mind for some reason. haha. wow. screw you brain. I guess it will just make sense to give it time to see if its fine in a bit.
I am also having the same problem! 
Logged in just to get the 4.3 preview and hit this same wall! Argh, 1st world problems…eye roll.
Actually. this isn’t a server down issue specifically. My friend can access his and has full access to the market place. while i have tried logging back in and what not. but still no luck. 
Very odd indeed.
Guys, try now, it seems to be working now.
ahh yeah nice! all good