What is this cook error failure?

I’m trying to compile a test content plugin, which simply holds one material, using the project launcher, however I keep facing the following errors -

Cook: LogInit:Display: LogCook:Error: Engine or Game content ../../../Engine/Content/Tutorial/Basics/LevelEditorAttract.uasset is being referenced by DLC!
Cook: LogInit:Display: LogCook:Error: Engine or Game content ../../../Engine/Content/Tutorial/Paper2D/SpriteEditorTutorial.uasset is being referenced by DLC!
Cook: LogInit:Display: LogCook:Error: Engine or Game content ../../../Engine/Content/Tutorial/Foliage/Foliage_Intro_Tutorial.uasset is being referenced by DLC!

plus several other errors of engine assets that I don’t recognize and haven’t used.

Any ideas?
Thanks

Did you solve this? I’m hitting it trying to build a completely empty DLC package that worked back on 4.15 (now on 4.17)

Sorry mate, it was a while ago now. I must have solved it or found a workaround but can’t remember the steps. If anything comes to mind, I’ll post back.

Hi creativestate,

I also meet this problem too, so I enable the checkbox of Include engine content inside the ProjectLauncher. And it helps me resolve the problem. Maybe you can give it a try.