Lua error in Module:Documentation at line 144: message: type error in message cfg.container (string expected, got nil).

local mArguments --initialize lazily
local yesno = require('Module:Yesno')
local mHatlist = require('Module:Hatnote list')
local mHatnote = require('Module:Hatnote')
local p = {}

--Implements {{For}} from the frame
--uses capitalized "For" to avoid collision with Lua reserved word "for"
function p.For (frame)
	mArguments = require('Module:Arguments')
	return p._For(mArguments.getArgs(frame))
end

--Implements {{For}} but takes a manual arguments table
function p._For (args)
	local use = args[1]
	local category = ''
	if (not use or use == 'other uses') and
		(not args.category or yesno(args.category)) then
			category = '[[Category:Hatnote templates using unusual parameters]]'
	end
	local pages = {}
	function two (a, b) return a, b, 1 end --lets us run ipairs from 2
	for k, v in two(ipairs(args)) do table.insert(pages, v) end
	return mHatnote._hatnote(
		mHatlist.forSeeTableToString({{use = use, pages = pages}}),
		{selfref = args.selfref}
	) .. category
end

return p