유닛 그룹이라는데 어딘지 모르겠네요

6560x Blizzard_InspectUI/InspectPVPFrame.lua:71: bad argument #1 to 'UnitFactionGroup' (Usage: local factionGroupTag, localized = UnitFactionGroup(unitName [, checkDisplayRace]))
[string "=[C]"]: in function `UnitFactionGroup'
[string "@Blizzard_InspectUI/InspectPVPFrame.lua"]:71: in function `InspectPVPFrame_Update'
[string "@Blizzard_InspectUI/InspectPVPFrame.lua"]:60: in function <Blizzard_InspectUI/InspectPVPFrame.lua:58>

Locals:
(*temporary) = nil