The problem was his storage.

PullResourceAdditions=/Game/Mods/Primal_Fear/Resources/BlueprintName.BlueprintName

Why integrate Primal Fear resources?

Walk up to the bin and hold 'E' (or your action key) to open the radial menu. Select .

Kaelen had tried to drop the Celestial Feathers in. The storage unit just beeped Error: Unrecognized Resource.