I'm trying to use this to be able to interact with objects and characters in my game, but Godot is giving me this error and I'm not sure why.

    Camp For...in loop iterator doesn't contain an index. It contains the value at that index, in your case an object.

    for i in iteract_areas:
    	var interact_area = i
    	# etc

    Or better:

    for interact_area in interact_areas:
    	# etc

    Camp

    is this running in physics_process? because that's the only place were you can interact with physics.

    interact_areas I think is okay, then you iterate through it.

    for i in interact_areas:

    what this does is iterate through the array and assign the current item to i, so you can run code on every item of the array

    var interact_area = interact_areas[i]
    this part is pointless, redundant, as i already contains what you want interact_area to be.

    you should also check if arrays contain items with:
    if not my_array.is_empty():
    and check if each item is valid, to prevent errors.