Dataservice does not save, no errors or anything like that, could anyone help?

Here, try my(Not actually mine got from yt vid) datastore script. You can change you leaderstats to yours. I have 2 leaderstats, though thant might not make a difference. Also, make sure HTTP requests are enabled under security:

local dataStoreService = game:GetService("DataStoreService")
local leaderstatsDataStore = dataStoreService:GetGlobalDataStore("leaderstats")

local loaded = {}

game.Players.PlayerAdded:Connect(function(player)
	local leaderstats = player:WaitForChild("leaderstats")
	if player.UserId > 0 and player.Parent then
		local leaderstatsdata = leaderstatsDataStore:GetAsync(player.UserId)	
		if leaderstatsdata ~= "Request Rejected" then
			if leaderstatsdata then			
				for i, stat in ipairs(leaderstats:GetChildren()) do	
					local value = leaderstatsdata[stat.Name]
					if value then
						stat.Value = value
					end
				end
			end
			loaded[player] = true
		end
	end
end)

game.Players.PlayerRemoving:Connect(function(player)
	local leaderstats = player:FindFirstChild("leaderstats")
	if leaderstats then
		if loaded[player] then
			local leaderstatsData = {}
			for i, stat in ipairs(leaderstats:GetChildren()) do
				leaderstatsData[stat.Name] = stat.Value
			end
			leaderstatsDataStore:SetAsync(player.UserId, leaderstatsData)
		end
	end
	loaded[player] = nil

end)

Hope his works!!!