Error appears even if no one touched the brick?

Hi guys

So i have a brick,that makes a gui appear.There are no errors in the script,and when the server starts this happens in the output:

16:53:25.182 - Workspace.Buildings.islands.Lobby.Stall.Touchy.Script:3: attempt to index local 'plr' (a nil value)

It keeps appearing until my error logger cannot take it anymore and says:

16:53:25.294 - HTTP 429 (HTTP/1.1 429 TOO MANY REQUESTS)

What is going on?heres the script

script.Parent.Touched:Connect(function(hit)
	local plr = game.Players:GetPlayerFromCharacter(hit.Parent)
	plr.PlayerGui.MainMenu.Visible = true
	plr.PlayerGui.Note.Visible = true
end)

it says that it is attempting to index a local plr(a nil value) even if there were no errors in the script.what does this mean?Please help

Upon the game starting, the first thing your Part touches is the baseplate. What you're lacking of is a humanoid check (people usually use this to check for players touching a part). The error pops because baseplate does not consist of PlayerGui yet you try to set the value of a non existent setting. Here's what you should do

script.Parent.Touched:Connect(function(hit)
	--I Suggest you adding a debounce here else it will over print
	humanoid = hit.Parent:FindFirstChild("Humanoid")
	if humanoid then
	    local plr = game.Players:GetPlayerFromCharacter(hit.Parent)
	    plr.PlayerGui.MainMenu.Visible = true
	    plr.PlayerGui.Note.Visible = true
	end
end)