In my case that helped. I had in-game internet connection issue, later the game didnt started at loading screen or/and splash screen. Watched a lot of Youtube, did a lot of thing, and nothing helped.
So, after few days of trying to make it work, I find a solution by my self, well, for me worked, dunno if other will help this, but better try everything.
1.Go to Settings/Update and security/Recovery/Reset this PC
2. After the windows resetted, I downloaded geforce experience, Java, Forza horizon 4, Forza Hub.
3. check updates for windows and geforce. (newest windows worked)
4.Go to Gaming/xbox networking/if it shows teredo press fix/after fix press check again.
These simple steps helped me