I tried to play, even joined my own game as a guest via incognito mode - but couldn't start the game. I set # of players to 2 but every time I clicked start it

I tried to play, even joined my own game as a guest via incognito mode - but couldn't start the game. I set # of players to 2 but every time I clicked start it said the game was configured to have 0 players which is invalid.