When I’m trying to equip existing loadout from my armory it wont equip. I think you can take a look at the chaos armor for this season when added to loadout, I think that maybe causing the issue.
This problem is also occurring for existing eternal realm players who don’t play seasons so do not have chaos items.
Eternal players have either sold or scrapped our now legacy items which show in the armor loadout with the red/white triangle on every armory profile.