[DataStore] GetAsync always nil, or SetAsync/UpdateAsync not working, why?

Hello guys, I'm trying to create stats for each player in my game, however it seems that SetAsync and UpdateAsync don't work, why? I never encountered this problem, maybe I'm doing something wrong:

This is the entire Main script:

local datastore = game:GetService("DataStoreService")
local players = game:GetService("Players")

function printOut(input)
    print("Level: " .. input)
end

function loadData(p, scope)
    local playerStats = datastore:GetDataStore("Stats", scope)
    local playerKnives = datastore:GetDataStore("Knives", scope)
    local playerSkins = datastore:GetDataStore("Skins", scope)

    local playerData = Instance.new("Model", p)
    playerData.Name = "PlayerData"

    local level = Instance.new("IntValue", p)
    level.Name = "Level"
    level.Value = 1

    local kills = Instance.new("IntValue", p)
    kills.Name = "Kills"
    kills.Value = 0

    local vip = Instance.new("IntValue", p)
    vip.Name = "Vip"
    vip.Value = 0

    local function initializeData()
        print("Initialized Data")
        pcall(function()
            playerStats:SetAsync("Level", 1)
            playerStats:SetAsync("Kills", 0)
            playerStats:SetAsync("Vip", 0)
        end)
    end

    pcall(function()
        if not playerStats:GetAsync("Level") then
            initializeData()
        else
            level.Value = playerStats:GetAsync("Level")
            kills.Value = playerStats:GetAsync("Kills")
            vip.Value = playerStats:GetAsync("Vip")
        end
    end)

    print("Loaded for player " .. p.Name .. " level: " .. level.Value .. " kills: " .. kills.Value .. " vip: " .. vip.Value)
end

function saveData(p, scope)
    local playerStats = datastore:GetDataStore("Stats", scope)
    local playerKnives = datastore:GetDataStore("Knives", scope)
    local playerSkins = datastore:GetDataStore("Skins", scope)

    local playerData = p.PlayerData
    pcall(function()
        print("Saving data")
        playerStats:UpdateAsync("Level", playerData.Level.Value)
        playerStats:UpdateAsync("Kills", playerData.Kills.Value)
        playerStats:UpdateAsync("Vip", playerData.Vip.Value)
    end)

    print("Saved for player " .. p.Name)
end


function onPlayerAdded(p)
    -- Datastore
    local scope = "cannot_show_you" .. p.UserId

    -- Events
    p.CharacterAdded:connect(function(character)
        onCharacterAdded(character, p, scope)
    end)

    p.Chatted:connect(function(msg)
        onChatted(p, msg)
    end)
end

function onPlayerRemoving(p)
    local scope = "cannot_show_you" .. p.UserId

    saveData(p, scope)
end

function onCharacterAdded(char, p, scope)
    char:WaitForChild("ForceField", 3)
    if char:FindFirstChild("ForceField") then
        char.ForceField:Destroy()
    end

    loadData(p, scope)
end

function onChatted(p, msg)
    -- can't show you the easter egg
end

players.PlayerAdded:connect(onPlayerAdded)
players.PlayerRemoving:connect(onPlayerRemoving)