Sign-in needed. You may not proceed without being signed in (FH4)

So when I try to launch Forza Horizon 3 and/or 4 (I paid for both games on Microsoft Store) I’m getting that error. On the other hand, Forza Horizon 5, which I have only from Gamepass, works without any issues.
This is on pc.
I’ve tried all solutions I could find on the web, morning seems to work. Before I purchased FH4, I had that problem with FH3. 4 worked fine when I had it from Gamepass. After I purchased it, it stopped working. I need help.