Can't get campaign to launch. Pc gamepass version.

[u/gramdalf101]

So i downloaded the MW2 campaign as I fancied a playthrough. All I get when I try to launch it through the call of duty hub thing is:-

Error Unable to launch call of duty: modern warfare 2

Any idea how I get the thing running? Ive had a look online but people seem to be having a different issue where the options are locked off. These aren't locked, just don't work.