Lua error timer failed when syntax highlighting is missing

[dvdvideo1234]

Describe the bug

I am trying to open the E2 editor via a script for automating a chip upload. However, I noticed the following error when the Editor mode for syntax highlighting is disabled:

[wiremod_git] addons/wiremod_git/lua/wire/client/text_editor/texteditor.lua:2143: bad argument #1 to 'pairs' (table expected, got nil)
  1. pairs - [C]:-1
   2. ac - addons/wiremod_git/lua/wire/client/text_editor/texteditor.lua:2143
    3. AC_Check - addons/wiremod_git/lua/wire/client/text_editor/texteditor.lua:2488
     4. unknown - addons/wiremod_git/lua/wire/client/text_editor/texteditor.lua:2469

Timer Failed! [E2_AC_Check][@addons/wiremod_git/lua/wire/client/text_editor/texteditor.lua (line 2468)]

How to reproduce the bug

As I open a file via Luapad, imagine you have some E2 code file: data/luapad/test.txt. Load the file via the following because I do not need syntax highlighting:

if(not IsValid(wire_expression2_editor)) then -- Expression 2 editor is not present
  wire_expression2_editor = vgui.Create("Expression2EditorFrame")
end -- Expression 2 editor is available, then use it to display file contents
if(not IsValid(wire_expression2_editor)) then
  Error("Frame invalid!"); return
end -- Setup the editor. Omit the last parameter to disable highlighting
wire_expression2_editor:Setup("Wiremod editor", "luapad/")
-- The highlighting style defaults to "Default" ( Neither E2 nor zCPU)
-- Load the file
local fF = "luapad/test.txt"
-- Do some logic
if(file.Exists(fF,"DATA")) then -- We cave category for the tracks
  wire_expression2_editor:Open(fF, nil, false) -- Let E2 handle file paths
  -- If the content is forced, the save triggers `save as`
else
  Error("File missing!")
end

Then click the first row to trigger the highlighting as a result, FindKeywords fails because there is no Default syntax

function Editor:Setup(nTitle, nLocation, nEditorType)
	self.Title = nTitle
	self.Location = nLocation
	self.EditorType = nEditorType
	self.C.Browser:Setup(nLocation)

	self:SetEditorMode(nEditorType or "Default")
	local editorMode = WireTextEditor.Modes[self:GetEditorMode() or "Default"]
-- Later used in the syntax function

local function FindKeywords(self, word)
	local suggestions, count = {}, 0
	for kw in pairs(self.CurrentMode.Keywords) do
		if kw:sub(1, #word) == word then
			count = count + 1
			local function get() return kw end

			suggestions[count] = {
				nice_str = get, str = get, data = { kw },

				replacement = function(self, editor)
					return kw, #kw
				end,

				selected_color = AC_COLOR_KEYWORD_SELECTED,
				color = AC_COLOR_KEYWORD,

				description = function() return "The keyword " .. kw end
			}
		end
	end

	return suggestions
end

[dvdvideo1234]

Probably when the syntax highlighting is disabled, suggestions are not needed?

The error is not present when autocompletion is disabled: