How do I enable a Gui from a normal script? [Solved]

I assume that you want to turn player's TextLabel invisible. Your problem is that you didn't include Player. By doing:

game.Players.Name.PlayerGui.Regen.TextLabel

You are "telling" the script to find player with name "Name" which doesn't have to exist.

to get player from ServerScript you may use PlayerAdded event

game.Players.PlayerAdded:connect(function(player) -- Player Variable

end)

Now that we have Player variable we can access to the Player's PlayerGui.

The final script:

game.Players.PlayerAdded:connect(function(player) -- Player Variable
local TextLabel = player.PlayerGui.Regen.TextLabel
TextLabel.Visible = false
wait(3)
TextLabel.Visile = true
end)

Note that this will happen when player joins the game.

To do this whenever you want just use LocalScript.

For Player variable type this:

local Player = game.Players.LocalPlayer -- This can be used only in LocalScripts