Matchmaking search stuck in game session

Matchmaking is not working. I keep getting kicked out multiplayer matchmaking search. It searching for game for a couple seconds then just kicks me out back to multiplayer screen. It seems like I might be stuck in a party or something because it says game session on the top right of the screen. There is no option to leave game session. I don’t know what this game session tab is for or know how to exit it. Please help me