Why is the click detector not working?

So the billboard gui should pop up when the npc is clicked but its not even detecting the click btw its in a local script

script.Parent.MouseClick:Connect(function(player)
	print("detect")
	script.Parent.Parent["Magic Dealer"].Head.BillboardGui.TextLabel.Visible = true
	print("Visible")
	local text = "What do you want?"
   
	local function typewrite(object,text)
		print("typewrite function")
		for i = 1,#text,1 do
			object.Text = string.sub(text,1,i)
			wait(0.05)
		end
	end

	typewrite(script.Parent.Parent["Magic Dealer"].Head.BillboardGui.TextLabel,text)
	wait(1)
	print("typewrite")
	script.Parent.Parent["Magic Dealer"].Head.BillboardGui.TextLabel.Visible = false
end)