Been trying to connect just says please wait then cant connect.
I’m not able to get into races either. I’m able to connect to the multiplayer menu, but can’t join any hoppers or league races. Must be the Forza servers 
It’s not been good all day but tonight was really bad. i managed to get into a couple of games eventually but they were a complete mess.
Can’t get into a league now either, it’s not going passed the loading screen to enter the lobby.
Working for me. But the lobbies are all dead it seems.
It’s been hit or miss for me today.