Can’t play online, I’ve Xbox live subscription

When I try to “play against AI” o when I go to “Multiplayer” and try to look for a match online (in Halo Wars 2) It appears a message saying that I need an Xbox Live subscription or an Internet Permission, but I already have my anual Xbox live subscription so I don’t know why I can’t play with it.

PLEASE solve me this problem, I justo bought it and wanna play it online.