i keep getting kicked to the main screen,help

When I try to play, specifically, Spartan Ops Chp 3 and mostly any other online game mode, I get kicked to the main screen. It doesn’t tell me “error” or nothing. I see the UNSC eagle load then the screen goes black for 15 seconds, then i’m back at the main screen. I called microsoft twice and they didnt really help me out except telling me that I have an out dated adapter. But my xbox buddies have the same adapter, with a newer xbox, so I doubt thats the problem too. Idk anybody else with this problem and any help would be very appreciated.