feat: fixed issue with lua 5.0 and backported Ace3

ElvUI_Config/Libraries/AceConfig-3.0/AceConfigDialog-3.0/AceConfigDialog-3.0.lua

@@ -942,18 +942,18 @@ local function BuildTabs(group, options, path, appName)
 
 	BuildSortedOptionsTable(group, keySort, opts, options, path, appName)
 
-	for i = 1, #keySort do
+	for i = 1, getn(keySort) do
 		local k = keySort[i]
 		local v = opts[k]
 		if v.type == "group" then
-			path[#path+1] = k
+			path[getn(path)+1] = k
 			local inline = pickfirstset(v.dialogInline,v.guiInline,v.inline, false)
 			local hidden = CheckOptionHidden(v, options, path, appName)
 			if not inline and not hidden then
 				tinsert(tabs, k)
 				text[k] = GetOptionsMemberValue("name", v, options, path, appName)
 			end
-			path[#path] = nil
+			path[getn(path)] = nil
 		end
 	end
 

README.md

@@ -6,6 +6,7 @@
 # This repository is actively being fixed and maintained by Bluewhale.
 
 ## Changelog
+- **Fix:** Fixed a Lua 5.0 syntax error in `AceConfigDialog-3.0.lua` where the `#` length operator was used instead of `table.getn`, preventing ElvUI_Config from loading.
 - **Fix:** Fixed nil ID formatting crash in Tooltip's SetHyperlink.
 - **Fix:** Removed implicit `arg` table memory leaks in high-frequency oUF element updates by replacing varargs (`...`) with static parameters.
 - **Fix:** Corrected bug in `Auras.lua` where unused buff icons remained visible on screen due to improper `deadIndex` calculation.