Why is my Audio Player erroring?

For some reason, it isn't working for me, and keeps saying the same error in the Output, the Output says 16:10:30.080 - Players.Player1.PlayerGui.AudioPlayer\.MainScript:43: attempt to index upvalue 'LolDescr' (a nil value) 16:10:30.083 - Stack Begin 16:10:30.084 - Script 'Players.Player1.PlayerGui.AudioPlayer\.MainScript', Line 43 16:10:30.086 - Stack End, but I don't know what I'm doing wrong, and I can't figure out how to fix it, here is the script;

--Audio Player, brought to you by TheeDeathCaster

repeat wait(0)until game.Players.LocalPlayer and game.Players.LocalPlayer:FindFirstChild("PlayerGui", true) and script.Parent and script.Parent:FindFirstChild("Frame", true) and script.Parent.Frame:FindFirstChild("AudioID", true) and script.Parent.Frame:FindFirstChild("Confirm", true) and script.Parent.Frame:FindFirstChild("Description", true) and script.Parent.Frame:FindFirstChild("NameOfAudio")

---------------
--  SETTING  --
---------------
local resetSongOnDeath = false --Set to true if you want the sound to stop onDeath, false if you don't

-----------------
-- Main Script --
-----------------
local plr = game.Players.LocalPlayer
local Frame = script.Parent.Frame
local AudioId = Frame.AudioID
local Confirm = Frame.Confirm
local NameOfAudio = Frame.NameOfAudio
local Desc = Frame.Description
local SongName = nil
local LolDescr = nil
local SongId = nil


if plr:FindFirstChild("NameOfSong") and plr:FindFirstChild("DescOfSong") and plr:FindFirstChild("SongId") then
local SongName = plr.NameOfSong
NameOfAudio.Text = SongName.Value
local LolDescr = plr.DescOfSong
Desc.Text = LolDescr.Value
local SongId = plr.SongId
AudioId.Text = SongId.Value
else
local SongName = Instance.new("StringValue",plr)
SongName.Name = "NameOfSong"
local LolDescr = Instance.new("StringValue",plr)
LolDescr.Name = "DescOfSong"
local SongId = Instance.new("StringValue",plr)
SongId.Name = "SongId"
end

AudioId.FocusLost:connect(function()
local Asset = game:GetService("MarketplaceService"):GetProductInfo(AudioId.Text)
Desc.Text = Asset.Description
LolDescr.Value = Desc.Text
NameOfAudio.Text = Asset.Name
SongName.Value = NameOfAudio.Text
SongId.Value = AudioId.Text
return true
end)

local function CreateAudio(ID)
for i,v in pairs(plr:GetChildren()) do if v:IsA("Sound") then v:Destroy() end end
local Sound = Instance.new("Sound")
Sound.SoundId = "http://www.roblox.com/asset/?id="..ID
Sound.Looped = true
Sound.archivable = false
if resetSongOnDeath then
Sound.Parent = plr.PlayerGui
else
Sound.Parent = plr
end
repeat Sound:Play() wait(2.5) Sound:Stop() wait(.5) Sound:Play() until Sound.IsPlaying
end

Confirm.MouseButton1Down:connect(function()
CreateAudio(AudioId.Text)
AudioId.Text = "Type ID"
end)

plr.Chatted:connect(function(msg)
if msg:lower():sub(1,2) == "a/" then
for i,v in pairs(plr:GetChildren()) do if v:IsA("Sound") then v:Destroy() end end
local Sound = Instance.new("Sound",plr)
Sound.SoundId = "http://www.roblox.com/asset/?id="..msg:sub(3)
Sound.Looped = true
Sound.archivable = false
repeat Sound:Play() wait(2.5) Sound:Stop() wait(.5) Sound:Play() until Sound.IsPlaying
local Azzet = game:GetService("MarketplaceService"):GetProductInfo(msg:sub(3))
Desc.Text = Azzet.Description
LolDescr.Value = Desc.Text
NameOfAudio.Text = Azzet.Name
SongName.Value = NameOfAudio.Text
SongId.Value = AudioId.Text
return true
end
return false
end)