"Unable to log in to multiplayer services" on Steam

For Christ’s sake just let us play the game in peace already. Can we have a week without issue?

Not only Steam, Xbox seems to have a problem too. I tried Steam and I couldn’t get matches (and from time to time I got that same error message).
Just now was watching streams, they can’t find matches and has troubles making lobbies and exhibitions.

Curious note, currently there are a lot of OG Killer Instinct (SNES version) speaking a language I can’t recognize xD