992x Blizzard_InspectUI/InspectPVPFrame.lua:71: bad argument #1 to 'UnitFactionGroup' (Usage: local factionGroupTag, localized = UnitFactionGroup(unitName [, checkDisplayRace]))
[C]: in function 'UnitFactionGroup'
[Blizzard_InspectUI/InspectPVPFrame.lua]:71: in function 'InspectPVPFrame_Update'
[Blizzard_InspectUI/InspectPVPFrame.lua]:60: in function <Blizzard_InspectUI/InspectPVPFrame.lua:58>

Locals:
(*temporary) = nil

버그에 이런게 떠서 어떤게 문제일까요