Why can't install Xbox 360 games with gold on Xbox One?

[Windows Central Question]

cant install xbox 360 games with gold on xbox one

when i try to install the xbox 360 games with gold ( free games ) i get this message that says can not download..Also I bought Just cause 3 for Xbox one ( disc not digital ) where I got a free code for Just cause 2 , and when redeemed this code on my xbox live , it didnt show on the ready to install Tab !! any help here
Thanks