UI doesn't work after packaging

So after countless day and night and pain, everything just f up after the final step----packaging. I just can’t figure out why my inventory UI worked just fine in the editor but f up after packging???WHY???

This is what it should be after i picked up the item

But it just doesn’t show after the packging.

JUST…WHY???I thought I set the right default gamemode, player controller, default HUD, the toggle UI part set well in the component part, every thing good, and it f in the end.

During packaging assets are cooked, so after packaging they can behave diffrently depending on settings in asset, so inspect that. If you use C++ and hard code references to assets in constructor or interact with asset registry, there chance you engine don’t see asset refrence and don’t package, you need to review packaing settings for that.

Best way to diagnose issue would be build Devlopment build and run game with -LOG option and see if any errors show up (they be red)

If you run on mobile you need to make sure the size of image is power of 2 number.

Thanks for your answer, goona try it immediately.