This code doesn't let me buy the clothes in my Homestore. How do i fix it?

It also adds a point to my leaderboard when bought.

local Button = script.Parent
local ItemID = 5334371663  --ID number of shirt
local ClickDetector = Instance.new("ClickDetector", Button)
local MS = game:GetService("MarketplaceService")

local function PurchaseItem(Player)
    local PurchaseCount = Player.leaderstats.PurchaseCount
    MS:PromptPurchase(Player, ItemID)
    for i in 0, 5 do
        local Success, playerOwnsAsset = pcall(MS.PlayerOwnsAsset, MS, Player, ItemID)
        if playerOwnsAsset then
            PurchaseCount.Value = PurchaseCount.Value + 1
        end
        wait(5)
    end
end

Click.MouseClick:Connect(PurchaseItem)