Why does my GUI that opens when touched only works once?

So I have a shop GUI where if the player touches the part, a GUI will pop up and when the GUI is closed and I touch the button again, the GUI doesnt show up now, what's going on? You can also provide an explanation because I have no idea what filtering enabled is if that is the solution. Thanks!

EDIT (SOLUTION) : DONT USE LOCAL SCRIPT, USE A NORMAL SCRIPT

Part script :

button = script.Parent

function onTouch(part)
	if part.Parent:FindFirstChild("Humanoid") ~= nil then
		local player = Game.Players:GetPlayerFromCharacter(part.Parent)
		if player ~= nil then
			local GUI = Game.ReplicatedStorage:FindFirstChild(script.Parent.ShopGUI.Value)
			local AlreadyHaveGUI = player.PlayerGui:FindFirstChild(script.Parent.ShopGUI.Value)
			if AlreadyHaveGUI == nil then
			GUI:Clone().Parent = player.PlayerGui
			else print("Already have GUI!")
			end
		end
	else print("Humanoid not found!")
	end
end

button.Touched:connect(onTouch)

Close script :

function close()
game.Players.LocalPlayer.PlayerGui.ArmorShopGUI2:Remove()
end

script.Parent.MouseButton1Click:connect(close)