DataStore not saving after player leaves ?

So basically, I want to save the data, but for some reason, it doesn't save it.

--I just put a part of my code
function generateDataTable(player)
	local CashPosition = game.ReplicatedStorage.PlayerCash:FindFirstChild(player.Name)
	print("1")
	if CashPosition then
		print("2")
		print(CashPosition.Value)
		local dataTable = {
			Cash = CashPosition.Value
		}
		print("3")
		return dataTable
	end
end

function saveDataForPlayer(player)
	print("s")
	local key = generateDataKey(player)
	local data = generateDataTable(player)
	print("Just one more thing !")
	datastore:SetAsync(key, data)
	print("set !")
end
--Oh and there is a PlayerRemoving event that is connected to the SaveDataForPlayer function

Let me explain: the CashPosition is an IntValue with the player's name (each player has one thing) because I first thought that data was not saved, because the leaderstats folder was already deleted from the game. So I created an IntValue that I put in ReplicatedStorage to use this value if the other one in leaderstats gets deleted.

So far it is printing up to ("Just one more thing !") so it does everything except the SetAsync function so I don't really know what to do in order for it to SAVE.

You got API Services on? If you don't, turn them on.