Making Clothing Data Store, Got "Attempt to index nil with number" Error

Help and Feedback Scripting Support
1

Edit: Sorry For Scam Title, I Accidently Typed It, I Fixed It Already, Sorry.

I Am Making Clothing Data Store So I Don’t Need To Equip Clothing Again After I Leaves, Actually I Am Begginer So I Am Making It With Data Store Tutorial.
Then, I Got Error Called "Attempt to index nil with number, line 37’

Script

local DataStoreService = game:GetService("DataStoreService")
local dataStore = DataStoreService:GetDataStore("ClothingSave")

local function SaveClothing(player)
	local character = player.Character or player.CharacterAdded:Wait()
	
	local TableToSave = {
	    character:WaitForChild("Shirt").ShirtTemplate,
	    character:WaitForChild("Pants").PantsTemplate	
	}
	
	local success, err = pcall(function()
		dataStore:SetAsync(player.UserId, TableToSave)
	end)
	
	if success then
		print("Data has been saved!")
	else
		print("Data hasn't been saved!")
		warn(err)
	end
end

game.Players.PlayerAdded:Connect(function(player)
	local character = player.Character or player.CharacterAdded:Wait()
	local ShirtId = character:WaitForChild("Shirt").ShirtTemplate
	local PantsId = character:WaitForChild("Pants").PantsTemplate
	
	local data
	local success, err = pcall(function()
	
	data = dataStore:GetAsync(player.UserId)
	
	end)
	
	if success then
		ShirtId = data[1]
		PantsId = data[2]
	else
		print("The player has no data!")
	end
end)

game.Players.PlayerRemoving:Connect(function(player)
	SaveClothing(player)
end)

game:BindToClose(function()
	for _, player in pairs(game.Players:GetPlayers()) do
		SaveClothing(player)
	end
end)

If Possible, Please Explain Why This Error Appear.

2

The “Attempt to index nil with number” error message means you are trying to get a value from a non-existing table.