Getting the following error when activating https://www.curseforge.com/wow/addons/healerprotection

Interface/AddOns/NDui/Core/Functions.lua:889: attempt to call method 'SetHighlightTexture' (a nil value)
Count: 1

Call Stack:
[string "=[C]"]: in function SetHighlightTexture' [string "@Interface/AddOns/NDui/Core/Functions.lua"]:889: in function ReskinTab'
[string "@Interface/AddOns/NDui/Modules/Skins/Blizzard/FrameXML/FriendsFrame.lua"]:8: in function func' [string "@Interface/AddOns/NDui/Modules/Skins/Skins.lua"]:40: in function LoadAddOnSkins'
[string "@Interface/AddOns/NDui/Modules/Skins/Skins.lua"]:77: in function OnLogin' [string "@Interface/AddOns/NDui/Init.lua"]:125: in function func'
[string "@Interface/AddOns/NDui/Init.lua"]:27: in function <Interface/AddOns/NDui/Init.lua:22>