Leveling System, Why isn't my Data Saving?

Making a custom leveling system Errors: None Whats wrong: Data is not saving Things to know: FE is turned on. And this is a serverscript

local DataStore = game:GetService("DataStoreService")
local ds = DataStore:GetDataStore("CashSaveSystem")
local Lvl = DataStore:GetDataStore("Level")
local XPS = DataStore:GetDataStore("XP")

game.Players.PlayerAdded:connect(function(player)
local leader = Instance.new("Folder",player)
leader.Name = "Stats"
local Cash = Instance.new("IntValue",leader)
local XPNeeded = Instance.new("IntValue",leader)
XPNeeded.Name = "XPNeeded"
local Level = Instance.new("NumberValue",leader)
Level.Name = "Level"
Cash.Name = "XP"
Cash.Value = ds:GetAsync(player.UserId) or 0
ds:SetAsync(player.UserId, Cash.Value)
Lvl:SetAsync(player.UserId, Level.Value)
XPS:SetAsync(player.UserId, XPNeeded.Value)
XPNeeded.Value = Cash.Value * 500 *1.75
Cash.Changed:connect(function()
	if Cash.Value >= XPNeeded.Value then
		Cash.Value = 0
		XPNeeded.Value = Cash.Value * 150 * 1.75
		Level.Value = Level.Value +1
		Lvl:SetAsync(player.UserId, Level.Value)
		XPS:SetAsync(player.UserId, XPNeeded.Value)
	end
ds:SetAsync(player.UserId, Cash.Value)
end)
end)


game.Players.PlayerRemoving:connect(function(player)
ds:SetAsync(player.UserId, player.Stats.XP.Value)
Lvl:SetAsync(player.UserId, player.Stats.Level.Value)
XPS:SetAsync(player.UserId, player.Stats.XPNeeded.Value)
end)

Try to enable in Configure Place the Place API and Save API and then it would save

Because when the player joins, you're setting the data stores to the intvalue's value (which is 0 since the player just joined and hasn't earnt anything). Don't use setasync when the player joins, and don't use it when the value changes (since there's a limit to how many times you can set a datastores value). Instead do it in intervals (like every 2 minutes) and when the player leaves or the server closes.

tl;dr: remove lines 16, 17 and 18.