So im making a lightsaber and when you press "E" the saber grows up with the tween service, its a tool and with in the tool is the local script for the saber to work, however when i press E to tween it it gives this error -

TweenService:Create failed because Instance is null - Client - LocalScript:21

****This is my local script What should i do?

local inputService = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local char = player.Character
local tweenService = game:GetService("TweenService")
local saber = script.Parent:FindFirstChild("Saber")
inputService.InputBegan:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.E then 
		local tweenInfo = TweenInfo.new(
			3,
			Enum.EasingStyle.Quint,
			Enum.EasingDirection.Out,
			0,
			false,
			1
		)
		local goals = {
			Size = Vector3.new(3.522, 0.175, 0.894)
			
		}
		
		local makeTween = tweenService:Create(saber, tweenInfo, goals)
		wait()
		makeTween:Play()
		
		print("Saber Open")
	elseif input.KeyCode == Enum.KeyCode.Q then 
		print("Saber Closed")
	end
	
	
end)
Anonymous