Help with GUIs?

So, this GUI script is in a TextButton in starterGUi. It is supposed to close the opening screen, and open the info screen.

local start = game.StarterGui.ScreenGui.Frame.start
local startscreen = game.StarterGui.ScreenGui.Frame

script.Parent.MouseButton1Click:connect(function()
	startscreen.visible = false
	game.StarterGui.info.visible = true
	
end)

I am having two problems

1. Nothing happens.
2. the output box says '20:59:24.963 - StarterGui:GetCoreGuiEnabled called from server script. Did you mean to use a local script?' I tried moving to a regular script, the same thing happened. It was originally in a LocalScript. Can you please help? After 30+ minutes of tinkering and YouTube tutorials, I can't figure it out. Thanks! -Anth4598 (Please be respectful in your answers, even if it is a kinda dumb question...)

Well, to start off, you should refer to the PlayerGui instead of the normal StarterGui.

Capitalization is key

LocalScript:

local start = game.Players.LocalPlayer.PlayerGui.ScreenGui.Frame.start
local startscreen = game.Players.LocalPlayer.PlayerGui.ScreenGui.Frame

script.Parent.MouseButton1Click:connect(function()
    startscreen.Visible = false
    game.Players.LocalPlayer.PlayerGui.ScreenGui.info.Visible =  true -- Not sure what you meant on this one. Is 'info' in the Frame? Comment if you have trouble editing this.
end)