Dirt 4 crashing on Xbox when trying to link account with RaceNet

For some unknown reason, RaceNet won't link to my Xbox account, causing the game to crash on my Xbox right at the start. Can someone explain this madness to me and help me solve it? In 2020, when I played this game, it worked fine. Now, in 2025, I can't play anymore because it seems like my account was restricted for no apparent reason, and I simply lost access to the game. I have no idea what RaceNet is; I've never needed it, and now, because of this site, I'm losing access to a game I paid for. I want an answer and a solution to the problem.