When this is enabled the colors on nameplates are just strobing. Getting some errors too (retail wow):

25x NamePlatesThreat/NamePlatesThreat.lua:694: attempt to call global 'GetAddOnInfo' (a nil value)
[string "@NamePlatesThreat/NamePlatesThreat.lua"]:694: in function <NamePlatesThreat/NamePlatesThreat.lua:690>

Locals:
self = Frame {
threat =

{
}
C_AddOns = {
}
addonIndex = 1
nonHeals = {
}
playerRole = "DAMAGER"
nonTanks = {
}
offTanks = {
}
offHeals = {
}
thisUpdate = 0
}
event = "ADDON_LOADED"
arg1 = "NamePlatesThreat"
(*temporary) = nil
(*temporary) = 1
(*temporary) = "attempt to call global 'GetAddOnInfo' (a nil value)"
NPT = Frame {
threat = {
}
C_AddOns = {
}
addonIndex = 1
nonHeals = {
}
playerRole = "DAMAGER"
nonTanks = {
}
offTanks = {
}
offHeals = {
}
thisUpdate = 0
}
NPTframe = Frame {
}