Halo Reach won’t install. Game pass on Xbox Series

Hi all. Last week I bought an Xbox Series X. I also purchased 12 months of Game Pass

The first thing I installed was Halo Master Chief Collection.

I tried playing Halo Reach multiplayer. Unfortunately it said it wasn’t installed. But directed me to where I could purchase. Strange I thought but ignore and simply played other modes online.

Last night I tried to play Halo Reach campaign. Again it said it wasn’t installed despite box being ticked on install screen.

OK I thought. I’ll uninstall Halo Reach part and multiplayer by unchecking the boxes on MCC. Then reinstall.

Unfortunately now I’ve uninstalled Reach campaign, I can’t readd it. The cursor simply will not allow me to click on the box within MCC.

Apart from uninstalling the whole of MCC, unclear what to do. I would rather not uninstall the whole thing at approx 110gb (excluding Reach).

Any idea how to reinstall just Reach with MCC would be appreciated. Thank you

This appears to be an issue at the moment. Until it’s raised as a known issue by 343 please makes sure and file a support ticket on the Halo Support site.
For the moment you can follow this topic for updates - it’s worth reading the last few pages for some extra informaiton:
https://www.halowaypoint.com/en-us/forums/85d779d52cfd46918b4f8b638f2e3c7b/topics/mcc-pc—missing-halo-___-dlc/c51c3be6-dfe2-4c96-a77a-ffef330e2061/posts