1x ...e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:854: Attempt to access forbidden object from code tainted by an AddOn
[string "=[C]"]: in function `SetOwner'
[string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:854: in function <...e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:853>

Locals:
(*temporary) = NamePlateTooltip {
waitingForData = false
layoutType = "TooltipDefaultLayout"
textLeft1Font = "GameTooltipHeaderText"
BottomOverlay = Texture {
}
textRight1Font = "GameTooltipHeaderText"
NineSlice = Frame {
}
TextRight1 = NamePlateTooltipTextRight1 {
}
TextRight2 = NamePlateTooltipTextRight2 {
}
TextLeft2 = NamePlateTooltipTextLeft2 {
}
TopOverlay = Texture {
}
comparing = false
0 =
needsReset = true
textLeft2Font = "GameTooltipText"
textRight2Font = "GameTooltipText"
TextLeft1 = NamePlateTooltipTextLeft1 {
}
updateTooltipTimer = 0.168000
}
(*temporary) = Frame {
0 =
OnLeave = defined @Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:866
auraInstanceID = 76148
layoutIndex = 1
Border = Texture {
}
isBuff = true
Cooldown = Cooldown {
}
OnEnter = defined @Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:853
CountFrame = Frame {
}
Icon = Texture {
}
spellID = 202090
}
(*temporary) = "ANCHOR_LEFT"

This might be a later symptom of the SetTargetClampingInsets "vague UI taint" issue later infecting default Blizzard UI panels (this is exactly what "tainting" does if untreated). Once that taint issue is solved this one should go away for good I hope, and hope it's not preventing important combat actions in the meantime :)