fix(Core): defer incompatible-addon StaticPopup past PLAYER_LOGIN

Kui_Nameplates/Core/Core.lua

@@ -502,7 +502,12 @@ function addon:OnInitialize()
 	addon.TankModule = addon:GetModule("TankMode")
 
 	if IsAddOnLoaded("PlateBuffs") then
-		StaticPopup_Show("KUINAMEPLATES_INCOMPATIBLE")
+		-- CoA: StaticPopup_Show silently fails when called from OnInitialize (ADDON_LOADED,
+		-- before PLAYER_LOGIN). Defer via C_Timer.After(0, …) so the popup fires after
+		-- the StaticPopup system is ready. See PORTING.md §StaticPopup_Show during PLAYER_LOGIN.
+		C_Timer.After(0, function()
+			StaticPopup_Show("KUINAMEPLATES_INCOMPATIBLE")
+		end)
 	end
 end
 ---------------------------------------------------------------------- enable --