Trying to make a job script With a clickdetector isent working?

button = script.Parent
button.ClickDetector.MouseClick:Connect(function()
	if game.Players.LocalPlayer.backpack:FindFirstChild("RobloxMug") then
		print("test")
	end

so there is a error in line 2 but i dont know how to fix it also i ask a lot of questions here and never answer them thats cause im stupid