BindToClose Isnt Working. i tried everything but nothing worked pls help?

The Bind To Close Function Is not working For Some Reason

game:BindToClose(function()
    local RunService = game:GetService("RunService")
    if RunService:IsStudio() then
        print("HAHA STUDIO")
        return
    end

    local Players = game:GetService("Players")
    for _, player in pairs(Players:GetPlayers()) do
        local Stats = player.LevelingSystem:GetChildren()
        local datastore = game:GetService("DataStoreService"):GetDataStore(player.UserId.."Stats")
        local statstorage = player:FindFirstChild("LevelingSystem"):GetChildren()
            local success , err = pcall(function()
            datastore:SetAsync("Lvl",statstorage.Lvl.Value)
            print("stat number 1 has been changed")

            datastore:SetAsync("XP",statstorage.XP.Value)
            print("stat number 2 has been changed")

            datastore:SetAsync("Money",statstorage.Money.Value)
            print("stat number 3 has been changed")

            datastore:SetAsync("EggHunter",statstorage.EggHunter.Value)
            print("stat number 4 has been changed")

            datastore:SetAsync("PreAlpha",statstorage.PreAlpha.Value)
            print("stat number 5 has been changed")

            datastore:SetAsync("Rank",statstorage.Rank.Value)
            print("stat number 6 has been changed")

            datastore:SetAsync("Missions",statstorage.Missions.Value)
            print("stat number 7 has been changed")

            datastore:SetAsync("Time",statstorage.Time.Value)
            print("stat number 8 has been changed")

            datastore:SetAsync("Banned",statstorage.Banned.Value)
            print("stat number 9 has been changed")

            datastore:SetAsync("BanR",statstorage.BanR.Value)
            print("stat number 10 has been changed")
            end)
    end
end)