For about two days now Ive been getting strange errors pointing at the default blizzard folders in the interface folder. I got those errors almost at random, cant find a pattern yet. Earlier I updated kui from here. Now Im getting this on login. Is this because of kui?

.e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:269: Usage: GetRaidTargetIndex(unit)
[string "=[C]"]: in function GetRaidTargetIndex' [string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:269: in function OnRaidTargetUpdate'
[string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:146: in function <...e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:136>
[string "=[C]"]: in function `OnNamePlateAdded'
[string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:78: in function <...e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:69>

Locals:
(*temporary) = nil

And this at the same time too:

StatusBar:GetLeft(): Action[FrameMeasurement] failed because[Can't measure restricted regions]: attempted from: StatusBar:GetLeft().
[string "=[C]"]: in function GetLeft' [string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:572: in function GetPreferredInsets'
[string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:191: in function UpdateInsetsForType' [string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:175: in function ApplyFrameOptions'
[string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:140: in function <...e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:136>
[string "=[C]"]: in function `OnNamePlateAdded'
[string "@Interface/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua"]:78: in function <...e/AddOns/Blizzard_NamePlates/Blizzard_NamePlates.lua:69>

Locals:
(*temporary) = StatusBar {
otherHealPrediction = Texture {
}
b = 0.447059
myHealAbsorbLeftShadow = Texture {
}
border = Frame {
}
background = Texture {
}
overAbsorbGlow = Texture {
}
barTexture = Texture {
}
0 =
r = 0.666667
totalAbsorb = Texture {
}
myHealPrediction = Texture {
}
g = 0.827451
totalAbsorbOverlay = Texture {
}
myHealAbsorbRightShadow = Texture {
}
overHealAbsorbGlow = Texture {
}
myHealAbsorb = Texture {
}
}

Nope