WowAce

Unlocked the SUF windows (displaying all of them using the mockup units) to position some unrelated window.  When I locked the windows again and they all vanished, this error happened.

5x [string "return function(unit, unitOwner, fontString..."]:2: Usage: UnitIsAFK("unit")
[C]: in function `UnitIsAFK'
[string "return function(unit, unitOwner, fontString..."]:2: in function <[string "return function(unit, unitOwner, fontString..."]:1>
ShadowedUnitFrames\modules\tags.lua:182: in function `func'
ShadowedUnitFrames\modules\tags.lua:227: in function `UpdateTags'
ShadowedUnitFrames\modules\tags.lua:241: in function <ShadowedUnitFrames\modules\tags.lua:241>
SharedXML\C_TimerAugment.lua:16: in function <SharedXML\C_TimerAugment.lua:14>

Locals:
(*temporary) = nil