Help with Developer Product not giving the Player coins when purchased?

Hello, I am currently trying to figure out how to make this Developer Product give the player who bought this 500 coins when purchased, however, It won't do that. Here is the LocalScript in StarterGui:

local buyButton = game.Workspace.BuyCoins.Buy["500Coins"]
local productId = 98321410

buyButton.MouseButton1Click:connect(function()
	game:GetService("MarketplaceService"):PromptProductPurchase(game.Players.LocalPlayer, productId)
end)

That part works, but here is the Script inside the button with the part that doesn't work:

local MarketplaceService = game:GetService("MarketplaceService")
local ds = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")
local productId = 98321410
 
-- define function that will be called when purchase finished
MarketplaceService.ProcessReceipt = function(receiptInfo) 
 
	-- find the player based on the PlayerId in receiptInfo
	for i, player in ipairs(game.Players:GetChildren()) do
		if player.userId == receiptInfo.PlayerId then
 
 
			-- check which product was purchased
			if receiptInfo.ProductId == productId then
 
				-- handle purchase
				player.Stats.Coins.Value = player.Stats.Coins.Value + 500
			end
		end
	end	
 local playerProductKey = "player_" .. receiptInfo.PlayerId .. "_purchase_" .. receiptInfo.ProductId
	ds:IncrementAsync(playerProductKey, 1)
 
	-- tell ROBLOX that we have successfully handled the transaction
	return Enum.ProductPurchaseDecision.PurchaseGranted		
end