Yes same here! I get onto the game loading screen after about 30 seconds wait the mission briefing voice over will run and then I get the error message 'connection to the game server was lost, error 4:5'. This happened to me 8 times (the amount of times I tried) last night.
Talking to other people on my friends list it seems the server/games were up and running fine at the same time I had the errors.
I will try again tonight and see what happens.
Well, I tried repeatedly for 3hrs yesterday!!! And am still to play the bloody thing. 3 days and counting.....
I know they know about the issues and have stated (in US forums) that they are working on them. But no advice..... do I just wait? Will a patch be coming out? Woudl a fresh install help? Not that I fancy that option, after installing TWICE already, when the 1.21 update decided to corrupt my copy of the MAG beta.