When will Xbox Live be working on Xbox 360 backwards compatible games again

Double check to make sure the game is backward compatible on this list.
https://www.xbox.com/en-GB/xbox-one/backward-compatibility/available-games. If it is on the list, then make sure your console is connected to Xbox Live and try inserting the game again in the xbox, and then install the game. Also some Xbox 360 games have
2 discs, so if one doesn't work, then try the other one.

Games with Gold Titles Included in Backward Compatibility

When backward compatibility launches in November, all future Xbox 360 Games with Gold titles will be playable on Xbox One. That means Xbox Live Gold members now will get more free games to play each month on Xbox One.

www.xbox.com/.../backward-compatibility

That game in particular is not backwards compatible, so it wouldn't work. You can view what games are backwards compatible on the 360 here and compatible games with the One here

360 Kinect functionality is not available when playing Backwards Compatible on the Xbox One. If Kinect was required for the 360, then the game will not work on the Xbox One. See more info here.

Talk them into playing a backward compatible 360 game from XBOX1 then they be in the backward compatibility mode. Then when playing tell them to send ya friend request again on 360 mode. Will work. I did that.