ScreenGui is not a valid member of PlayersGui, help please?

So i have been working on a GUI then i converted it to LUA by using GUI to LUA Converter, and i added a "Close" Button. But when i click Button it says this "ScreenGui is not a valid member of PlayersGui" Here is the script of the close button converted

    script.Parent.MouseButton1Click:Connect(function()
        game.Players.LocalPlayer.PlayerGui.ScreenGui.MainFrame.Visible = false
    end)
end