MCC installed but doesn't recognize the files?

I just got a new PC and I downloaded MCC with the Xbox pass, I tried opening multiplayer and I got a popup saying “Halo CE is not installed, would you like to install it now?” and after several tries and reboots I decided to reinstall the whole game, but now after the new installation when I load the game is says none of the games are installed! this really sucks, can someone help with this?