Why I can't storage IntValue to the DataStore?

Hello!

I'm making a game, and I wrote a script, that creates a new IntValue for a leaderstats-folder (it's created already in another script). Value is counting player's minutes in the game. But some reason, it doesn't work. Here's the script:

local DataStoreService = game:GetService("DataStoreService")
local TimeData = DataStoreService:GetDataStore("TimeStats")

game:GetService("Players").PlayerAdded:Connect(function(player)			 --Player joins the game

	local leaderstats = player:FindFirstChild("leaderstats")
	local Minutes = Instance.new("IntValue", leaderstats) 				-- Creating new integer value for leaderstats

	Minutes.Name = "Minutes"											--
	Minutes.Value = 1													-- Integer's properties
	Minutes.Value = TimeData:GetAsync(player.UserId) 					--


	local Data = TimeData:GetAsync(player.UserId)
	if Data then	
		Minutes.Value = Data											-- Minute's value = player's data
	end

	local alwtrue = true												-- always true :)

	repeat 																-- looping forever
		wait(60)
		Minutes.Value = Minutes.Value + 1
	until
	alwtrue == false

end)

game:GetService("Players").PlayerRemoving:Connect(function(player)	
	TimeData:SetAsync(player.UserId, player.leaderstats.Minutes.Value)	-- Storaging data

end)

Everytime I get the same error:

Minutes is not a valid member of Folder "Players.____.leaderstats"  -  Server - Script:30