I've read in the Wiki how it works but I don't understand it, this is what I've tried:
Main Game:
TP:SetTeleportSetting("test1",script.Parent.Parent.test)
TP:Teleport(1938410195,game.Players.LocalPlayer)
test is a ScreenGui
Sub-place:
print(TP:GetTeleportSetting())
Output: Argument 1 missing or nil
