My GUI Loading Screen is not working and I dont know what the problem is?

So I am trying to make a GUI script where on join you get a GUI, in order to Click the Button to let the GUI disappear you need to have permission. But I think I am doing something wrong in my script.(LocalScript) Can anyone take a look into my script and see what is wrong?

gui = script.Parent
Button = gui.TextButton
BigText = gui.BigText
Note = gui.Note
NoAcces = gui.NoAccess
gui.Visible = true
gui.NoAccess.Visible = false


Access = {["maup12345"] = true,["TristyOfficial"] = true}
function OnClicked()
	if Access["maup12345"] == true and Access["TristyOfficial"] == true then
		gui.Visible = false
	elseif Access["maup12345"] == false and Access["TristyOfficial"] == false then
		gui.Visible = true
		gui.NoAccess.Visible = true
		wait(3)
		gui.NoAccess.Visible = false
	end
end

script.Parent.TextButton.MouseButton1Click:Connect(OnClicked)

Thank you!

Just one more thing, I tried figuring out how to kick the local player who does not have access to the game but couldnt figure it out. How do I kick the local player who pressed the Button if he does not have access?