Script won't find leaderstats or MoneyValue and just stops the script?

Reply to horvathmf: Heres the code in ServerScriptService:

local DataStoreService = game:GetService("DataStoreService")
local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

local dataStore = DataStoreService:GetDataStore("Players")
local default = {
    SessionLock = false,
    Cash = 0
}
local updateAsync = Enum.DataStoreRequestType.UpdateAsync

local function waitForRequestBudget()
    local currentBudget = DataStoreService:GetRequestBudgetForRequestType(updateAsync)

    while currentBudget < 1 do
        currentBudget = DataStoreService:GetRequestBudgetForRequestType(updateAsync)
        wait(5)
    end
end

local function setUp(player)
    local name = player.Name
    local userId = player.UserId
    local key = "Player_" .. userId

    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"

    local cash = Instance.new("IntValue")
    cash.Name = "Cash"

    local success, data, shouldWait
    repeat
        waitForRequestBudget()
        success = pcall(dataStore.UpdateAsync, dataStore, key, function(oldData)
            oldData = oldData or default
            if oldData.SessionLock then
                --He is still sessionlocked, so just wait
                if os.time() - oldData.SessionLock < 1800 then
                    --session is alive
                    shouldWait = true
                else
                    --session is dead, take over
                    oldData.SessionLock = os.time()
                    data = oldData
                    return data
                end
            else
                oldData.SessionLock = os.time()
                data = oldData
                return data
            end
        end)

        if shouldWait then
            task.wait(5)
            shouldWait = false
        end
    until (success and data) or not Players:FindFirstChild(name)
    if success and data then
        cash.Value = data.Cash

        cash.Parent = leaderstats
        leaderstats.Parent = player
    end
end

local function save(player, dontLeave, dontWait)
    local userId = player.UserId
    local key = "Player_" .. userId

    local leaderstats = player:FindFirstChild("leaderstats")

    if leaderstats then
        local cashValue = leaderstats.Cash.Value
        local success

        repeat
            if not dontWait then
                waitForRequestBudget()
            end
            success = pcall(dataStore.UpdateAsync, dataStore, key, function()
                return {
                    SessionLock = dontLeave and os.time() or nil,
                    Cash = cashValue
                }
            end)
        until success
    end
end

local function onShutdown()
    if RunService:IsStudio() then
        task.wait(2)
    else
        local finished = Instance.new("BindableEvent")
        local allPlayers = Players:GetPlayers()
        local leftPlayers = #allPlayers

        for _,player in ipairs(allPlayers) do
            coroutine.wrap(function()
                save(player, nil, true)
                leftPlayers -= 1
                if leftPlayers == 0 then
                    finished:Fire()
                end
            end)()
        end

        finished.Event:Wait()
    end
end

for _,player in ipairs(Players:GetPlayers()) do
    coroutine.wrap(setUp)(player)
end

Players.PlayerAdded:Connect(setUp)
Players.PlayerRemoving:Connect(save)
game:BindToClose(onShutdown)

while true do
    wait(60)
    for _,player in ipairs(Players:GetPlayers()) do
        coroutine.wrap(save)(player, true)
    end
end