I’m having the same errors and also errors like this:
LoadErrors: Warning: While trying to load package /Game/Effects/Fort_Effects/World/NewChests/NS_Chest_Knight
my chests were first disappearing out of nowhere, which i fixed by verifying uefn’s files, and now my chests only drop two different weapons (this is the case for the chest from chest and ammo gallery). And in-game it only drops resources and not even weapons. This is since the chapter 2 update. It’s ruining my player base and map.