SCP Script door error «Vector3 expected, got CFrame» how to fix?

I'm not really good in CFrame so can you help me for fix this?:/

15:25:48.386 - Workspace.Gate.Script:8: bad argument #2 to '?' (Vector3 expected, got CFrame)

deboulse = false

script.Parent.Button.ClickDetector.MouseClick:connect(function(player)
	if deboulse == false then
		deboulse = 2
		print(player.Name.." open door")
		for index, door in pairs(script.Parent.Parts:GetChildren()) do
			for i = 0,100 do
				door.CFrame = door.CFrame-CFrame.new(0,0,-4)
				wait()
			end
		end
		for index, light in pairs(script.Parent.lights:GetChildren()) do
			light.Color = BrickColor.new("Really red")
		end
		script.Parent.lights.BrickColor = BrickColor.new("Really red")
		deboulse = true
	elseif deboulse == true then
		deboulse = 2
		print(player.Name.." close door")
		for index, door in pairs(script.Parent.Parts:GetChildren()) do
			for i = 0,100 do
				door.CFrame = door.CFrame-CFrame.new(0,0,4)
				wait()
			end
		end
		for index, light in pairs(script.Parent.lights:GetChildren()) do
			light.Color = BrickColor.new("Institutional white")
		end
		script.Parent.lights.BrickColor = BrickColor.new("Institutional white")
		deboulse = false
	end
end)

Explorer: https://gyazo.com/ebc068f3ba1378368b4869dab81c79a6