PackagingResults: Warning: Unable to find package for cooking

During the cook process of packaging I get a bunch of these errors? I tried using this cook settings and without: -AdditionalCookerOptions=“-cookprocesscount=4”. 1Either way I see errors. Sometimes without that multi-thread cook setting, it works, but not always.

LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the target package was marked NeverCook or is not cookable for the target platform.
    Source package: /Landmass/Landscape/BlueprintBrushes/Materials/Sprite/M_BrushSprite_01
    Target package: /Engine/EditorResources/S_Terrain
    Referenced object: /Engine/EditorResources/S_Terrain