Your creator tool did not compile the resources correctly. Ensure you have a wallpaper.png (500x500px) and that you selected "Build Full Library" not just "Build Instrument."
The central hub where you can manage your Windows downloads and updates for both Kontakt and Creator Tools. 2. How to Build Your First Library on Windows kontakt library creator windows download
After creating your library, you must link it to the Kontakt software: Your creator tool did not compile the resources correctly