Can someone help with my data structure? (dataStore request was added to queue.)

I dont why this script does not save data. If I take out if not game:GetService("RunService"):IsStudio() then, then it'll save data, but it gives me an error dataStore request was added to queue.

local DataStore = game:GetService("DataStoreService"):GetDataStore("BM_Statpoints_LevelSystem_DataStore_1") -- we create a new data store

local function Save(Player) 
	local saveTable = {}
	for i = 1, #Player:WaitForChild("Data"):GetChildren() do 
		if i == 1 then 
			saveTable[1] = Player:WaitForChild("Data"):WaitForChild("Level").Value 
		elseif i == 2 then 
			saveTable[2] = Player:WaitForChild("Data"):WaitForChild("Exp").Value 
		elseif i == 3 then 
			saveTable[3] = Player:WaitForChild("Data"):WaitForChild("ExpMax").Value 
		elseif i == 4 then 
			saveTable[4] = Player:WaitForChild("Data"):WaitForChild("Statpoints").Value 
		elseif i == 5 then 
			saveTable[5] = Player:WaitForChild("Data"):WaitForChild("Strength").Value
		elseif i == 6 then 
			saveTable[6] = Player:WaitForChild("Data"):WaitForChild("Speed").Value 
		elseif i == 7 then 
			saveTable[7] = Player:WaitForChild("Data"):WaitForChild("Intelligence").Value 
		elseif i == 8 then 
			saveTable[8] = Player:WaitForChild("Data"):WaitForChild("Defense").Value 
		end
	end
	DataStore:SetAsync(Player.UserId, saveTable) 
end

game.Players.PlayerAdded:Connect(function(Player) 
	
	local folder = Instance.new("Folder", Player) 
	folder.Name = "Data"
	
	local level = Instance.new("IntValue", folder) 
	level.Name = "Level"
	
	local exp = Instance.new("IntValue", folder) 
	exp.Name = "Exp"
	
	local expmax = Instance.new("IntValue", folder) 
	expmax.Name = "ExpMax"
	
	local statpoints = Instance.new("IntValue", folder)  
	statpoints.Name = "Statpoints"
	
	local strength = Instance.new("IntValue", folder) 
	strength.Name = "Strength"
	
	local speed = Instance.new("IntValue", folder)  
	speed.Name = "Speed"
	
	local intelligence = Instance.new("IntValue", folder)  
	intelligence.Name = "Intelligence"
	
	local defense = Instance.new("IntValue", folder)  
	defense.Name = "Defense"
	
	local success, errormessage = pcall(function() 
		local retrievedData = DataStore:GetAsync(Player.UserId)
		if retrievedData then 
			for i, value in pairs(retrievedData)do 
				if i == 1 then
					level.Value = value  
				elseif i == 2 then 
					exp.Value = value 
				elseif i == 3 then 
					expmax.Value = value  
				elseif i == 4 then 
					statpoints.Value = value  
				elseif i == 5 then 
					strength.Value = value  
				elseif i == 6 then 
					speed.Value = value  
				elseif i == 7 then 
					intelligence.Value = value  
				elseif i == 8 then 
					defense.Value = value  
				end
			end
		else 
			level.Value = 1
			exp.Value = 0
			expmax.Value = 100
			statpoints.Value = 0
			strength.Value = 0
			speed.Value = 0
			intelligence.Value = 0
			defense.Value = 0
		end
	end)
	if success then 
		print("Successfully loaded " ..Player.Name.."'s data.")
	end
	if errormessage then 
		error("Error while loading ".. Player.Name.."'s data: "..errormessage)
	end
	
end)

if not game:GetService("RunService"):IsStudio() then
	game:BindToClose(function() 
		for i, Player in pairs(game.Players:GetChildren())do 
			Save(Player) 
		end
	end)
end


game.Players.PlayerRemoving:Connect(function(Player) 
	Save(Player) 
end)