Close the project then go to the project files. Go to
“SurvivalGameKit\Content\SurvivalGameKit\Blueprints\HUD”

Then download the files linked below, unpack the folder and copy and paste the files in the the folder mention above.

https://www.dropbox.com/s/4zsbfxcj0jj03z9/CraftingTooltip.zip?dl=0