ROBLOX Marketplace Service Error?

I have a script that gives you a tool once you buy a developer product from an NPC through the dialog, it worked last month and now that I made minor edits to it, it doesn't want to work. Not sure what's wrong with it. The developer products are set up and everything, so are the ID's. The game doesn't give me back an error report either, it just says "An error has occurred please try again later". Not sure what to do.

local Service = game:GetService("MarketplaceService");
local SellItems = {
 ["Knife"]  = 24271258;
 ["TrenchGun"] = 24271246;
 ["Mk-17"] = 24271315;
 ["Uzi"] = 24271280;
}

for Name,Item in pairs(SellItems) do
 local Choice = script.Choice1:Clone();
 Choice.Name = Name
 Choice.UserDialog = Name
 Choice.ResponseDialog = "Don't give away my location!";
 Choice.Parent = script.Parent;
end

function GetChoice(Name)
 for _,ID in pairs(SellItems) do
  if _ == Name then
   return _,ID
  end
 end
return
end

script.Parent.DialogChoiceSelected:connect(function(Player, Choice) 
local s,e = coroutine.resume(coroutine.create(function()
 if SellItems[Choice.Name] and Player then
 local Choice,ID = GetChoice(Choice.Name)
  if Player.Character and Choice and ID then
   if not Player.Character:findFirstChild(Choice) then
    if Player:findFirstChild("Backpack") then
     if not Player.Backpack:findFirstChild(Choice) then
       print("Does not own");
       Service.ProcessReceipt = (function(receiptInfo)
        local Gun = game.Lighting:WaitForChild(Choice):Clone()
        Gun.Parent = Player.Backpack; 
        Service.ProcessReceipt = nil;
       end)
       Service:PromptProductPurchase(Player,ID);
     end
    end
   end
  end
 end
end))
if not s then Instance.new("Hint",game.Workspace).Text = "Error: "..e end
end)