I have no idea why this happens, but it happens WAY too often. I'll be running the server for awhile, sometimes 10 minutes or 2 hours, and I'll get this cryptic error message in the console:
"Error sending outgoing packets: No Error"
It usually pops up about 100 times in a row too, followed by:
"Disconnected from Master Server"
This is crazy. I'll be in a game and never know it even happened. The game doesn't lag, I just suddenly notice that the server is dwindling down on players and no one new is coming in and check the console and sure enough, every time, this is what I see. Why doesn't the darn server even try to reconnect after that?
Any advice or commiseration would be appreciated.

Recently whenever I try to join a server, It loads up. The moment it finishes downloading map, it closes and goes back to my screen. no errors.
my antivirus history show me entering fullscreen mode and exiting that mode moments later.

Possible solutions?