I have 4 Munificent pieces of gear that I received in the past 2 days from Garrison Missions that when I try to use them, it says “You Can’t Use This Item”. I have: Spaulders, Trinket, Robes, and Leggings. Can’t use any of them.
If these are no longer used in the game, they as well as Follower upgrades (which can’t be used) should be removed from Garrison Missions.