Click TextButton to get kicked from the server script doesn't work, can anyone help?

Hello! I'm experimenting with scripting so I'm fairly new, and I wanted to create a button that can kick you from the server.

FateButton = workspace.killroom.KBcontrolpanel.KILLBUTTON
function death(gb,msg)
	FateButton.Part.SurfaceGui.TextLabel.Text = (gb)
	print(msg)
	return
end
FateButton.SurfaceGui.TextButton.MouseButton1Click:Connect(function()
	local plr = game.Players:FindFirstChild()
	FateButton.SurfaceGui.Enabled = true
	death("You clicked the kick button, you are now being kicked.","Kicking player..")
wait(3)
	plr:Kick("Kicked because you pressed the kick button")
end)

The output says line 8 is wrong because "Argument 1 missing or nil." This is outside of my small circle of knowledge about Lua scripting, so if anyone knows about it, please help.

Rather than doing FindFirstChild(), try doing

FateButton = workspace.killroom.KBcontrolpanel.KILLBUTTON
	function death(gb,msg)
	    FateButton.Part.SurfaceGui.TextLabel.Text = (gb)
	    print(msg)
	    return
	end
	FateButton.SurfaceGui.TextButton.MouseButton1Click:Connect(function()
	    local plr = game.Players.LocalPlayer
	    FateButton.SurfaceGui.Enabled = true
	    death("You clicked the kick button, you are now being kicked.","Kicking player..")
	wait(3)
	    plr:Kick("Kicked because you pressed the kick button")
	end)

As FindFirstChild() Needs an argument of which part or object you are trying to find.