Splitscreen Multiplayer xbox360Game on Xbox one does not work

i have the same issue with the game "Heavy Weapon:Atomic Tank" i canot play the Game with two player because it dont let Sign in a Guest to the Game.

I have Gold and a Xbox oneS

I'm sorry but you can not do, you should resume the 360 to do this, the one has the back compatibility to a certain point. But I think if you connect the second profile of your wife on the console one then associate the pad of your wife with the account..
It might work.

Hello there,

It is understood that the issue being experienced here consists of an inability to add a guest in order to play a backwards compatible game on your Xbox One console.

The truth is that the ability to play as a guest is dependent on if the developer allows it.

For this game in particular, it may be that it was intended not to work in this way, as there are games that do allow guests to sign in and play.

Best wishes!

Sorry to hear that you are having issues with the game. Have you tried signing into both accounts before starting the 360 game?. One account signed into one controller, and the other account signed into the other controller?

hi,

have you try a power cycle and clear the game Cache:

https://support.xbox.com/xbox-one/console/power-cycle-console

How to
clear Game Cache on
the Xbox One:

Settings

System

Storage

Clear Local
Saved Games

Yes and Restart