I'm trying to use a command for a map I am creating and I need to test for if an armorstand by the name of Skeletor is wearing a golden helemet on its head. Here's the command I've been using/testfor @e[name=Skeletor,Inventory=[{Slot:103,id:golden_helemet}]
:
/testfor @e[name=Skeletor,Inventory=[{Slot:103,id:golden_helemet}]
but its says The entity UUID provided is in an invalid format.:
The entity UUID provided is in an invalid format.