testing script on team play and got weird error code?

i was testing a script on a team play. the script is for saving a table for a obby stage. but wen i test it i get a error code that does not make sense. can any one help pleas?

the error code is : 21:07:42.839 - 502: API Services rejected request with error. HTTP 403 (Forbidden)

local DataStoreService = game:GetService("DataStoreService")
    local DataStore = DataStoreService:GetDataStore("MyDataStore")


    game.Players.PlayerAdded:Connect(function(player)

    local ack = Instance.new("Folder")
    ack.Name = "leaderstats"
    ack.Parent = player

    local ack2 = Instance.new("IntValue")
    ack2.Name = "Stage"
    ack2.Parent = ack

    local data

    local success, errormassage = pcall(function()
        data = DataStore:GetAsync(player.UserId.."-stage")
        end)
        if success then
            ack2 = data
        else
            print("there was an error whilst getting your data")
            warn(errormassage)      end

    local test = player.leaderstats.Stage.Value


    end)

    function oa(object)
        wait()
    local player = game.Players:playerFromCharacter(object)
    if player ~= nil then
    local ls = player.leaderstats
    local sl = game.Workspace:FindFirstChild(ls.Stage.Value)
    print("gah")
    object.Torso.CFrame = object.Torso.CFrame + Vector3.new(0,3,0)

    if sl ~= nil then
    object.Torso.CFrame = sl.CFrame + Vector3.new(0,3,0)
    end
    end
    end

    game.Workspace.ChildAdded:connect(oa)

    game.Players.PlayerRemoving:Connect(function(player)

        local success, errormessage = pcall(function()
            DataStore:SetAsync(player.UserId.."-stage",player.leaderstats.Stage.Value)
        end)
         if success then
            print("Player Data successfully saved!")
        else
            print("there was an error when saving data")
            warn(errormessage) 
        end
    end)