[SOLVED] Saving tables using DataStore2?

I scripted a DataStore script using https://devforum.roblox.com/t/how-to-use-datastore2-data-store-caching-and-data-loss-prevention/136317. The script worked at first, but then it suddenly stopped working. Both scripts are located in ServerScriptService, and now I am receiving an error in the output: ServerScriptService.Game.Server.DataStoreManager:38: attempt to index upvalue 'userData' (a number value).

--[[
    author: 8_zn
--]]

--//Services\\--
local Players = game:GetService("Players")
local serverScriptService = game:GetService("ServerScriptService")
local replicatedStorage = game:GetService("ReplicatedStorage")

--//Module\\--
local dataStore2 = require(serverScriptService:WaitForChild("Game"):WaitForChild("Modules"):WaitForChild("DataStoreModule"))

--//Events\\--
local eventsFolder = replicatedStorage:WaitForChild("Events")
local updateCurrencyEvent = eventsFolder:WaitForChild("UpdateCurrencyEvent")

--//Script\\--
local function setupUserData()
    local userData = {
        Currency = {
            ["Fossil"] = 0;
        };
        
        Dinosaur = {
            ["Tyrannosaurus Rex"] = false;
            ["Allosaurus"] = false;
            ["White Terror"] = false;
        };
    }
    return userData
end

Players.PlayerAdded:Connect(function(Player)
    local userDataStore = dataStore2("UserData", Player)
    local userData = userDataStore:Get(setupUserData())
    
    local function updateClientCurrency()
        local fossilAmount = userData["Currency"]["Fossil"]
        updateCurrencyEvent:FireClient(Player, fossilAmount)
    end
    
    updateClientCurrency(userData)
    userDataStore:OnUpdate(updateClientCurrency)
end)

Thank you!

This is what I would do. Not sure about tables, but I figured this out.

--// Setup

local DataStore2 = require(1936396537)

local defaultFossils = 0
local defualtTREX = false
local defualtAllo = false
local defualtWhiRor = false

DataStore2.Combine("MainKey","Fossils","T-REX","Allo","WhiRor")


game.Players.PlayerAdded:Connect(function(Player)
	
	--// Fossil
	
	local leaderstats = Instance.new("Folder",Player)
	leaderstats.Name = "leaderstats"
	
	local fossilsValue = Instance.new("IntValue",leaderstats)
	fossilsValue.Name = "Fossils"
	
	local fossilStore = DataStore2("Fossils",Player)
	
	local function updateFossils(value)
		Player.leaderstats.Fossils.Value = value
	end
	
	updateFossils(fossilStore:Get(defaultFossils))
	
	fossilStore:OnUpdate(updateFossils)
	
	
	--// Dinosaur Data
	
	local dinosaurData = Instance.new("Folder",Player)
	dinosaurData.Name = "DinosaurData"
	
	
	--// T-REX
	
	local trexStore = DataStore2("T-REX",Player)
	
	local trexValue = Instance.new("BoolValue",dinosaurData)
	trexValue.Name = "Tyrannosaurus Rex"
	
	local function updateTREX(value)
		Player.DinosaurData["Tyrannosaurus Rex"].Value = value
	end
	
	updateTREX(trexStore:Get(defualtTREX))
	
	trexStore:OnUpdate(updateTREX)
	
	
	--// Allo
	
	local alloStore = DataStore2("Allo",Player)
	
	local alloValue = Instance.new("BoolValue",dinosaurData)
	alloValue.Name = "Allosaurus"
	
	local function updateAllo(value)
		Player.DinosaurData.Allosaurus.Value = value
	end
	
	updateAllo(alloStore:Get(defualtAllo))
	
	alloStore:OnUpdate(updateAllo)
	
	
	--// WhiRor
	
	local whirorStore = DataStore2("WhiRor",Player)
	
	local whirorValue = Instance.new("BoolValue",dinosaurData)
	whirorValue.Name = "White Terror"
	
	local function updateWhiror(value)
		Player.DinosaurData["White Terror"].Value = value
	end
	
	updateWhiror(whirorStore:Get(defualtWhiRor))
	
	whirorStore:OnUpdate(updateWhiror)
end)

It's a ServerScript in ServerScriptService.

To test it in studio, put a BoolValue in ServerStorage and name it SaveInStudio and set it to True.

If there are any errors, please let me know so I can fix it for you.