Bugfixes: Removed retail API calls, ran linting script and static analysis.

ElvUI_Config/Libraries/AceGUI-3.0/widgets/AceGUIContainer-TreeGroup.lua

@@ -331,7 +331,7 @@ local methods = {
 		toggle:SetHeight(14)
 		toggle:ClearAllPoints()
 		toggle:SetPoint("TOPRIGHT", button, "TOPRIGHT", -6, -1)
-		toggle:SetHighlightTexture("Interface\Buttons\UI-PlusButton-Hilight", "ADD")
+		toggle:SetHighlightTexture("Interface\\Buttons\\UI-PlusButton-Hilight", "ADD")
 		toggle:SetScript("OnClick", Button_OnClick)
 		button.toggle = toggle
 		toggle.obj = button

ElvUI_Config/Nameplates.lua

@@ -1046,8 +1046,10 @@ E.Options.args.nameplate = {
 							set = function(info, value) selectedFilter = value; UpdateFilterGroup() end,
 							values = function()
 								filters = {}
-								for filter in pairs(E.global["nameplates"]["filter"]) do
-									filters[filter] = filter
+								if E.global["nameplates"] and E.global["nameplates"]["filter"] then
+									for filter in pairs(E.global["nameplates"]["filter"]) do
+										filters[filter] = filter
+									end
 								end
 								return filters
 							end