What is wrong with this Module script, to local script? [Unanswered]

I am trying to Weld a Model to a Player, with the Weld Function in a ModuleScript, called "ModuleFunctions", then calling it in a LocalScript. There is nothing in the Output that relays an error of any sort. These are the two scripts:

Module:

function Weld1(Object, Object_Path, Middle, Part, Part_Path)
	local Model = game[Object_Path][Object]:clone()
	Model.Parent = game.Workspace[Part_Path][Part]
	local C = Model:GetChildren()
	for i=1, #C do
		if C[i].className == "Part" or C[i].className == "Union Operation" then
			local W = Instance.new("Weld")
			W.Part0 = Model[Middle]
			W.Part1 = C[i]
			local CJ = CFrame.new(Model[Middle].Position)
			local C0 = Model[Middle].CFrame:inverse()*CJ
			local C1 = C[i].CFrame:inverse()*CJ
			W.C0 = C0
			W.C1 = C1
			W.Parent = Model[Middle]
		end
		local Y = Instance.new("Weld")
		if Part == nil then 
			Y.Part0 = game.Workspace[Part_Path]
		elseif Part ~= nil then
			Y.Part0 = game.Workspace[Part_Path][Part]
		end
		Y.Part1 = Model[Middle]
		Y.C0 = CFrame.new(0, 0, 0)
		Y.Parent = Y.Part0
	end
	local h = Model:GetChildren()
	for i = 1, # h do
		h[i].Anchored = false
		h[i].CanCollide = false
	end
end

return Weld1

Local Script:

ModuleFunction = require(game.Workspace.ModuleFunctions)

Player = game.Players.LocalPlayer
Humanoid = Player.Character:WaitforChild("Humanoid")
player = Humanoid.Parent

ModuleFunction("Hook", "Lighting", "Middle", "Right Arm", "Player1")

EDIT I have tried this Local Script too, and it hasn't worked:

ModuleFunction = require(workspace.ModuleFunctions)

Player = game.Players.LocalPlayer
Humanoid = Player.Character:WaitforChild("Humanoid")
player = Humanoid.Parent
a = game.Workspace:WaitForChild("Player1")
ModuleFunction("Hook", "Lighting", "Middle", "Right Arm", a)

You're returning the function directly, so the correct usage is actually:

ModuleFunction = require(game.Workspace.ModuleFunctions)

ModuleFunction(...)

Alternatively, you can update your Module to use a table, and return that instead:

local Exports = {}

function Exports.Weld1(...)
	-- ...
end

return Exports