"this item is not currently for sale"??

Hello everyone! I have a little problem, I tried to sell a developer product but when it's prompted to the user, it always says: "this item is not currently for sale. Your account has not been charged".

Here is my code:

local rep = game.ReplicatedStorage

local event = rep.PaymentEvent

event.OnServerEvent:connect(function(player,recipient,kind)
    game:GetService("MarketplaceService"):PromptPurchase(game.Players:FindFirstChild(recipient), 120073404)
    print("event sent")
end)

Thanks for your help and time, Jonas