Attempt To Call A Nil Value?

I'm making an FNaF game on Roblox and I put two Camera Blocks and I also put a GUI button to switch Cameras but It says "Attempt To Call A Nil Value"

Here's the code:

local Player = game.Players.LocalPlayer
local Character = Player.Character or Player.CharacterAdded:Wait()
local Camera = workspace.CurrentCamera
local TurnButton = game.StarterGui.TurnGUI.TurnButton


function onClick()
	repeat wait()
		Camera.CameraType = Enum.CameraType.Scriptable
	until Camera.CameraType == Enum.CameraType.Scriptable
	Camera.CFrame = workspace.CameraPOV2.CFrame
end
script.Parent.MouseButton1Click:connect()

Can someone please help me?