LocalScript mouse text works in Studio, but not in-game?

I have this script that put a text label next to the mouse as you move it around, if you hover over a player, it shows their player name next to the mouse and when you don't hover over a player, it shows nothing. This script works in Studio on test mode and the test server feature, but it doesn't work in-game roblox. Any suggestions?

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local debounce = false
local target = nil
local playerFound = false
local playerName = nil

mouse.Move:connect(function()
	target = mouse.Target
	if not target --[[or not (target.Parent:findFirstChild("Humanoid"))]] then
		if player.PlayerGui:findFirstChild("MouseText") then
			player.PlayerGui.MouseText.TextLabel.Text = ""
		end
	else
		if not (player.PlayerGui:findFirstChild("MouseText")) then
			local mouseGui = Instance.new("ScreenGui",player.PlayerGui)
			mouseGui.Name = "MouseText"
			local mouseText = Instance.new("TextLabel",mouseGui)
			mouseText.Size = UDim2.new(0,10,0,10)
			mouseText.BackgroundTransparency = 1
			mouseText.TextXAlignment = "Left"
			mouseText.TextStrokeTransparency = 0
			mouseText.TextColor3 = Color3.new(255,255,255)
		end
		if player.PlayerGui:findFirstChild("MouseText") then
			if target.Parent:IsA("Hat") and target.Parent.Parent:findFirstChild("Humanoid") then
				if target.Parent:findFirstChild("Humanoid") then
					player.PlayerGui.MouseText.TextLabel.Text = target.Parent.Parent.Name
					playerFound = true
					playerName = target.Parent.Parent.Name
				else
					player.PlayerGui.MouseText.TextLabel.Text = ""
					playerFound = false
				end
			else
				if target.Parent:findFirstChild("Humanoid") then
					player.PlayerGui.MouseText.TextLabel.Text = target.Parent.Name
					playerFound = true
					playerName = target.Parent.Name
				else
					player.PlayerGui.MouseText.TextLabel.Text = ""
					playerFound = false
				end
			end
			mouse.Button1Down:connect(function()
				if playerFound == true then
					if not (player.PlayerGui:findFirstChild("PlayerSelectOption")) then
						local newOptionGUI = script.Parent.PlayerSelectOption:clone()
						newOptionGUI.Main.PlayerName.Value = playerName
						newOptionGUI.Main.Script.Disabled = false
						newOptionGUI.Parent = player.PlayerGui
						newOptionGUI.Main.Visible = true
					end
					player.PlayerGui.ServeSystem.Serve.Title.Text = "Serving Player: "..playerName
					player.PlayerGui.ServeSystem.Serve.PlayerName.Value = playerName
				end
			end)
			player.PlayerGui.MouseText.TextLabel.Position = UDim2.new(0,mouse.X+10,0,mouse.Y-5)
		end
	end
end)

Problem

The only problem I can see is that since it works in studio and not in server it should be a latency problem, this happens because in studio everything is pretty much local so you don't have to wait for a server to create stuff so your local scripts run instantly. In server this doesn't happen as when a local scripts cause upons something in player or character that is server-sided then the local script is "local" which makes it run faster then the server can respond.

Solution

repeat wait() until game.Players.LocalPlayer.Character--To the top of every local script