NO script EVER will get PlayerGui from LocalPlayer, why wont it get PlayerGui?

local Detector = script.Parent.ClickDetector
local Tool = game.Workspace["Green Key"]
local Part = script.Parent

Detector.MouseClick:Connect(function(Player)
	game.Workspace.BoogieBattle.boogiedispenser.sign.Part.SurfaceGui.TextLabel.Visible = true
	if game.Players.LocalPlayer.PlayerGui.Values.NC.NCValue.Value == 10 then
		local Clone = Tool:Clone()
		local handle = Clone:FindForChild("Handle")
	Clone.CFrame = game.Workspace.tppart.CFrame
		Part:Destroy()
	else
		game.Workspace.BoogieBattle.boogiedispenser.sign.Part.SurfaceGui.TextLabel.Text = "You dont have enough NoseCoins!"
		wait(3)
		game.Workspace.BoogieBattle.boogiedispenser.sign.Part.SurfaceGui.TextLabel.Text = "You must pay 10 Nose Coins to play Boogie Battle"
	end
end)

This script above is a script that needs to find PlayerGui, so it can either post a message and dispense a key, or show a different message.

I have many scripts with this error, and this error: "Attempt to index nil as "PlayerGui" keeps destroying my sanity to get my games finished.