I am using ProcessReceipt at the top of Kohl's Main Script and it does not work?

There is no errors when entering or someone buying but i put this at the top of the MAIN PART of Kohls Admin Script:

MarketplaceService = Game:GetService("MarketplaceService")
MarketplaceService.ProcessReceipt = function(receiptInfo)
players = game.Players:GetPlayers()

for i=1,#players do
    if players[i].userId == receiptInfo.PlayerId then
        if receiptInfo.ProductId == GamePassId then
            table.insert(admins,players[i].Name)
        end
        if receiptInfo.ProductId == GamePassId1 then
            table.insert(owners,players[i].Name)
        end
    end
end
    return Enum.ProductPurchaseDecision.PurchaseGranted 
end

What it is supposed to do, right away when somone buys a gamepass it will automatically give them admin.

What is wrong with it?