Why won't my armors unlock?

Why won’t my armors related to MCC achievements and watching Halo Nightfall unlock?

I got the same problem…with just the VI

https://www.halowaypoint.com/en-us/forums/4b66b79375424f41add6422ddef89ffb/topics/nightfall-armor-didnt-unlock/3cb98f43-5fa2-4f4f-9e72-27c4134a8c0b/posts

seems to be a persistent problem unfortunately