I have to buy Halo Nightfall but I already did

So, I downloaded Halo Nightfall onto my Xbox but when I open it on Halo Channel it says that I don’t own it. Its really annoying and if anyone could help me it would be much appreciated.

Did you buy it via the Halo Channel app or did you buy it via the Movies and TV app? You can only watch it on the Halo Channel if you buy it through that app

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> Did you buy it via the Halo Channel app or did you buy it via the Movies and TV app? You can only watch it on the Halo Channel if you buy it through that app

When I look in the Halo Channel download information it says that the Halo Nightfall add-on is installed