Works in Studio but not In-Game?

I've been creating an intro gui that works perfectly within studio, however when I publish it to the game of its purpose, it breaks down and everything is stuck. What is the cause for this issue? How can I fix it?

This is the main programming script. Yes I have all configurations and slides within the gui.

local Screen = script.Parent
local Config = Screen.Config
local Player = Screen.Parent.Parent
local Filter = Screen.Filter
local Content = Screen.Content
local Play = Screen.Play

function FilterFade(start,finish,step)
	for i = start,finish,0.03/step do
		Filter.BackgroundTransparency = i
		wait()
	end
	Filter.BackgroundTransparency = finish
end

if not Player:FindFirstChild(Config.TAG_NAME.Value) then
	local tag = Instance.new("IntValue")
	tag.Name = Config.TAG_NAME.Value
	tag.Parent = Player

	Filter.Visible = true
	for _,image in pairs(Content:GetChildren()) do image.Visible = false end
	wait(Config.Padding_Time.Value)
	for _,image in pairs(Content:GetChildren()) do
		image.Visible = true
		FilterFade(0,1,Config.Fade_Time.Value)
		wait(Config.Display_Time.Value)
		FilterFade(1,0,-Config.Fade_Time.Value)
		image.Visible = false
		wait(Config.Display_Time.Value)
	end
	wait(Config.Padding_Time.Value)
	Screen.Background.BackgroundTransparency = 0.7
	Filter.BackgroundTransparency = 0.7
   wait(2)
   script.Parent:remove()
end