Getting this bug when in combat

Message: Interface\AddOns\NeatPlates\NeatPlatesCore.lua:584: Usage: UnitEffectiveLevel("unit")
Time: Mon Jan 28 22:18:07 2019
Count: 2
Stack: Interface\AddOns\NeatPlates\NeatPlatesCore.lua:584: Usage: UnitEffectiveLevel("unit")
[C]: ?
[C]: in function UnitEffectiveLevel' Interface\AddOns\NeatPlates\NeatPlatesCore.lua:584: in function <Interface\AddOns\NeatPlates\NeatPlatesCore.lua:581> Interface\AddOns\NeatPlates\NeatPlatesCore.lua:457: in function <Interface\AddOns\NeatPlates\NeatPlatesCore.lua:454> Interface\AddOns\NeatPlates\NeatPlatesCore.lua:1004: in function ?'
Interface\AddOns\NeatPlates\NeatPlatesCore.lua:1039: in function <Interface\AddOns\NeatPlates\NeatPlatesCore.lua:1038>

Locals:

I can't seem to reproduce this one. Any chance you could expand a bit on when you are getting this error?
Okay turns out this only shows up if you have "Personal Resource Display" enabled. I'll push a fix for this shortly.