local MarketplaceService = game:GetService("MarketplaceService")
local ds = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")
local productId = 29974967

MarketplaceService.ProcessReceipt = function(receiptInfo) 
 
	for i, player in ipairs(game.Players:GetChildren()) do
		if player.userId == receiptInfo.PlayerId then
 
 
			if receiptInfo.ProductId == productId then
				
				player.Gems.Value = player.Gems.Value + 5
			end
		end
	end	
 
	local playerProductKey = "player_" .. receiptInfo.PlayerId .. "_purchase_" .. receiptInfo.ProductId
	ds:IncrementAsync(playerProductKey, 1)	
 
	return Enum.ProductPurchaseDecision.PurchaseGranted		
end

I do not use a leaderstats model (I put the variables in the player directly) and no errors in output, it keeps giving me an error when I try to purchase the dev. Product.

AnonymousEdited