i get this error on login to classic server using classic version posted here:

3x Kui_Nameplates\messages.lua:347: Attempt to register unknown event "UNIT_THREAT_LIST_UPDATE"
[C]: in function RegisterEvent' Kui_Nameplates\messages.lua:347: in function RegisterEvent'
Kui_Nameplates\messages.lua:353: in function RegisterUnitEvent' ...faceKui_Nameplates\plugins/combat-update.lua:55: in function OnEnable'
Kui_Nameplates\messages.lua:503: in function `Enable'
Kui_Nameplates\addon.lua:156: in function <Kui_Nameplates\addon.lua:127>

Locals:
(*temporary) = {
0 =
}
(*temporary) = "UNIT_THREAT_LIST_UPDATE"

That's fixed in the classic version, so you probably downloaded the wrong zip. This one should work, bearing in mind the classic branch is basically just a quick fix right now.