Why does the GUI not pop up when I walk on the brick?

local Part = script.Parent

Part.Touched:connect(function(HIT)

local H = HIT.Parent:FindFirstChild("Humanoid")

if H then

local Player = game.Players:GetPlayerFromCharacter(HIT.Parent)

Player.PlayerGui.ScreenGui.Frame.Visible = true

end end)

Trying to make a GUI pop up when I walk on a brick. Seems to have no errors yet it does not work.

Hmmm...if you want to make a GUI pop up, try this:

function AppearGui()
	for _,c in pairs(game.Players:GetPlayers()) do
		c.PlayerGui.ScreenGui.Frame.Visible = true
	end
end
script.Parent.Touched:connect(AppearGui)

It should be quite that simple, really.