Local Player is nil.. Help? [SOLVED]

Guys I need help with this error that has been messing me up since I got it for the first time. Basicly the script works in studio perfectly. But, in game when I click the "Part" it says that "LocalPlayer" is a nil value..

Here's the script:

script.Parent.ClickDetector.MouseClick:connect(function()
    script.Disabled = true
    local backup= game.Players.LocalPlayer.PlayerGui.CatchStuffMinigame:Clone()
game.Players.LocalPlayer.PlayerGui.CatchStuffMinigame.Background:TweenPosition(UDim2.new(0,600,0,100),"In","Linear",2)
wait(10)
game.Players.LocalPlayer.PlayerGui.CatchStuffMinigame.Background:TweenPosition(UDim2.new(0,-400,0,100),"Out","Linear",2)
wait(2)
game.Players.LocalPlayer.PlayerGui.CatchStuffMinigame:Remove()
backup.Parent = game.Players.LocalPlayer.PlayerGui
wait(20)
script.Disabled = false
end)

If anyone could help me it would be GREAT!