I’m also getting this issue. If I try to join a game it kicks me out with the same message while the ticker goes from -1 to -2. Behind it is the login screen that says “Client requested disconnect”.
I am able to watch replays, open lootboxes, and change things on characters. I cannot get into any games though, custom or otherwise as of yesterday afternoon (played earlier in the day successfully).
I’ve checked for updates and scanned and repaired through the battle.net client. When those options didn’t work I reinstalled the game. I’ve tried changing servers, Turned off my anti-virus, Flushed DNS, and Power cycled router nothing working.
Overwatch Version is 1.40.0.0.62065
Running on Windows 10 build 17134