I can not connect to my Forza Horizon 3 profile

The first error message is: "Login required

You can not continue without being connected to a profile. " (Forza Horizon 3 )

Then the second is just when I click on the connect it does nothing. (Forza Hub)

I'm on windows 10, I only have digital.

Currently I only have Forza Horizon 3 on the windows store so yes, there are no Forza that do not work.

No other problem with my other games.

I have exactly the same gray square for forza horizon 3 but it does not last long, half a second I would say, here I have time to take it in screen

Thanks for trying Lester, but none of that helped. Still unable to connect to multiplayer in Forza Horizon 3 or Forza Horizon 4 on PC.

I played forza horizon then forza 3 beat horizon then got 3 played 3 until I got to year 3 in season racing went back to horizon and got the achievement and cars tried it on a different profile and it wont give me the achievement so ignore all this garbage
about swapping save devices and what not there is a bug or 2 in horizon and that is one of them so it may or may not give you it there isn't any thing you can do about I have tried all theories on how to get it and non of them work

I play on xbox one S.

I don't wrote a wrong code.

When you want to pimp you're car on Forza Horizon 3, 4 ,5 , you can take a search on steekers aply about différents subject.

Exemple,

I have Ford mustang cobra and I would like add cobra design on the side car. When I take my new search, forza horizon send message that server connection is impossible or that I check my internet connection.

1， yes

2，
support.xbox.com/.../forza-horizon-3-faq not sure your brother's profile been homed with you or not, or the console itself is home console for you...better try out. "You can only be signed in at one place at a time while playing Forza Horizon 3, or any
other title that supports Xbox Play Anywhere.". I think it depends how your brother tied with your account then, like other Xbox games.