O.O well it says 22:34:17.227 - Script 'Players.Player.PlayerGui.Health.LocalScript', Line 6 22:34:17.227 - Stack End but one thing that might be the problem the thing it says is: Frame is not a valid member of screengui.So can you plz tell me what they mean by that?
It means there is nothing there called Frame, either not at all or not yet. Use WaitForChild
if it is supposed to be there but hasn't loaded yet.
Did you make sure in the script you wrote out screengui.Frame instead of ScreenGui.Frame, and that the title of the gui in StarterGui is 'screengui'?