My Forza Horizon 4 wont start up

Try switching games and then starting Forza up again.

In my experience when things like that happen my Xbox doesn't recognize just that one game title I want to play and I've had to restart my Xbox for it to work. I hope this maybe helps.

I would suggest uninstalling and reinstalling the game. I know this may take a while, and its unfortunate that you may have to do so. This tends to work for me. I had that issue with Gears 5 when the Operation 3 came out. I reinstalled the game and haven't
had any issues yet.

Best of luck!

Im 100% aure i dont have one it worked fine but after i came back from us it stopped working

Hi AlexanderNorrby, ar you sure you don't have an update in progress ?

That kind off helped exept that i had to factory reset my pc for it to work xD Thanks for the ideq about the gqme that gave me the idea to reaet the pc.