I don't know if it'll help, but a few days ago I was having this happen. Then when I backed out to the main menu and went back in to try again I immediately got some kind of connection error. Closing the game and re-opening it got rid of that error, and also allowed me to find a match within a minute again. It's possible that error is why you can't find a game (even though it doesn't notify you until you try to search a second time).
It's also possible that no one is playing at this time of night, though I'd think that pretty unlikely since the game is so new.

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