Since yesterday,
there has been an issue for Steam and Divinity 2. Not Steam and other games, ONLY Divinity 2. Doing anything else on Steam seems to work.
Whenever you try and launch the game, you get the message "Steam Servers are too busy to handle your request." You need to go into Offline Mode to get the game to start. No other attempted fixes work.
Worse yet, people who bought the game since yesterday are unable to download it.
So if I were you, Larian, I'd get the Steam people on the phone really quickly to find out what's going on.