Why is this giving me this erorr?

Help and Feedback Scripting Support
1 
-- Services
local Players = game:GetService("Players")
local DSS = game:GetService("DataStoreService")
local RS = game:GetService("RunService")

local Data = DSS:GetDataStore("Data")

local currentSession = {}

-- Variables

function player_added(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	
	local Punches = Instance.new("IntValue")
	Punches.Name = "Punches"
	Punches.Value = 0
	Punches.Parent = leaderstats
	
	local Wins = Instance.new("IntValue")
	Wins.Name = "Wins"
	Wins.Value = 0
	Wins.Parent = leaderstats	
		
	local success = nil
	local playerData = nil
	local attempt = 0
	
	repeat
		success,playerData = pcall(function()
			return Data:GetAsync(player.UserId)
		end)

		attempt += 1
		if not success then
			warn(playerData)
			task.wait(3)
		end
	until success or attempt >= 4
		
	if success then
		print("Database has been initialized")
		if not playerData then
			print("Player data doesn't exist, assigning default value.")
			playerData = {
				["Punches"] = 0,
				["Wins"] = 0,
			}
		end
		currentSession[player.UserId] = playerData
	else
		warn("Unable to access Database")
		player:Kick("We are unable to load your data. Please contant a developer or try again later.")
	end
	
	Punches.Value = currentSession[player.UserId].Punches
	Wins.Value = currentSession[player.UserId].Wins
	
	Punches.Changed:Connect(function()
		currentSession[player.UserId].Punches = Punches.Value
	end)

	Wins.Changed:Connect(function()
		currentSession[player.UserId].Wins = Wins.Value
	end)
		
	leaderstats.Parent = player	
end

function player_leave(player)
	if currentSession[player.UserId] then
		local success = nil
		local errorMSG = nil
		local attempt = 0
		
		repeat
			success,errorMSG = pcall(function()
				Data:SetAsync(player.UserId, currentSession[player.UserId])
			end)
			
			attempt += 1
			if not success then
				warn(errorMSG)
				task.wait(3)
			end
		until success or attempt >= 4
		
		if success then
			print("Data for : " .. player.UserId .. " has been saved.")
		else
			warn("Unable to save data for : " .. player.UserId .. " please contact a developer.")
		end
	else
		warn("Unable to save data due to player being Nil.")
	end
end

function server_shutdown()
	for i, player in ipairs(Players:GetPlayers()) do
		task.spawn(function()	
			player_leave()
		end)
	end
end

game:BindToClose(server_shutdown)
Players.PlayerAdded:Connect(player_added)
Players.PlayerRemoving:Connect(player_leave)

ServerScriptService.Data.DataSavingLeaderStats:72: attempt to index nil with ‘UserId’

This works on my other game but not this one. Can anyone help me? Thank you

2

You are not parsing player in this line

Make sure to parse player Like so :

player_leave(player)
3

still doesn’t work but it doesnt give me the error anymore thanks

4

What doesn’t work? You only mentioned the error.

5

Oh my fault. This is a data saving system for my game. The data saving doesn’t work

6

Is it warning or printing? Also try printing the attempts.

7

There is nothing in the output

8

Try putting more print statements. I’ll look into the code later

9

Datastore API might’ve been disabled on this place file. Go to GameSettings on Studio and check if the “Allow Datastore APIs” or something field’s checkbox is ticked on.

10

You’ve forgotten to also parse the player here