[Not Needed] bad argument #1 to 'pairs' (table expected, got nil)?

I'm getting an error on line 32 that, not sure why or how. I tried changing the DB name, since it's the root of the hierarchy.

Picture https://gyazo.com/86638338ee70f1b6788fe096bcdf1a9b

local AUTO_SAVE = true

local TIME_BETWEEN_SAVES = 60

local PRINT_OUTPUT = true

local SAFE_SAVE = true

  

local players = game:GetService("Players")

local dataStoreService = game:GetService("DataStoreService")

local leaderboardData = dataStoreService:GetDataStore("I8SB90AnsjGJAK?FA*Mz")

  

local function Print(message)

if PRINT_OUTPUT then print(message) end

end

  

local function SaveData(player)

wait(2.5)

if player.userId < 0 then return end

player:WaitForChild("BackendData")

wait()

local BackendData = {}

for i, stat in pairs(player.BackendData:GetChildren()) do

table.insert(BackendData, {stat.Name, stat.Value})

end

leaderboardData:SetAsync(player.userId, BackendData)

Print("Saved "..player.Name.."'s data")

end

  

local function LoadData(player)

if player.userId < 0 then return end

player:WaitForChild("BackendData")

wait()

local leaderboardStats = leaderboardData:GetAsync(player.userId)

for i, stat in pairs(leaderboardStats) do

local currentStat = player.BackendData:FindFirstChild(stat[1])

if not currentStat then return end

currentStat.Value = stat[2]

end

Print("Loaded "..player.Name.."'s data")

end

  

players.PlayerAdded:connect(LoadData)

players.PlayerRemoving:connect(SaveData)

  

if SAFE_SAVE then

game.OnClose = function()

for i, player in pairs(players:GetChildren()) do

SaveData(player)

end

wait(1)

end

end

  

while AUTO_SAVE do

wait(TIME_BETWEEN_SAVES)

for i, player in pairs(players:GetChildren()) do

SaveData(player)

end

end

Trial 2 (I messed up hard with my first answer lol)

I believe when the last player leaves, it tries to save the player's data. But the player is 'deleted' because the server closes before it can even save it.

Once OnClose is fired, there are zero players in the game. It will pass the loop and wait 1 second before closing. While that is happening, the SaveData() function is waiting 2.5 seconds before saving the player's data but the server will be closed by then.

I hope this is correct this time...