ServerScriptService.Script:44: attempt to perform arithmetic on local 'playerData' (a nil value)?

Why this script not work?:( It's a beta Daily Reward system, to get the countdown..

In ServerScript:

--< Services
local PlayerService = game:GetService("Players")
local RStorageService = game:GetService('ReplicatedStorage')
local DataStoreService = game:GetService("DataStoreService")

--< Variables
local DailyRewards = DataStoreService:GetDataStore("dailyRewards")

local RewardTime = 24 -- one day
local RewardAmmount = 50 --they get 50 money each day

local SessionData = {}

--< Event
PlayerService.PlayerAdded:Connect(function(player)
	local ls = Instance.new("Folder")
	ls.Name = "leaderstats"
	ls.Parent = player
	
	SessionData[player] = {}
	SessionData[player]["Cash"] = 100
	
	local money = Instance.new("IntValue", ls)
	money.Name = "Cash"
	money.Value = SessionData[player]["Cash"]
	
	local playerData = nil
	
	pcall(function() -- no errors pls
		playerData = DailyRewards:GetAsync("player_" .. player.UserId)
	end)
	
	if playerData then
		if ((tick() - playerData) / (60 * 60)) >= RewardTime then
			money.Value = playerData + RewardAmmount
			DailyRewards:SetAsync(player.UserId, tick())
		else
			money.Value = playerData
		end
	else
		DailyRewards:SetAsync(player.UserId, tick())
		playerData = DailyRewards:GetAsync("player_" .. player.UserId)
	end
	require(script.Parent.ModuleScript):ConvertTime((tick() - playerData))
end)

In ModuleScript:

local module = {}

local Type = 0

function module:ConvertTime(t)
	-- Variables
	
	-- Sec, Min, and Hour equations I actually got off of Google. Everything else was written by me
	local sec = math.floor((t%60))
	local min = math.floor((t/60)%60)
	local hour = math.floor((t/3600)%24)
	
	-- Set time
	sec = tostring((sec < 10 and "0" or "") .. sec)
	min = tostring((min < 10 and "0" or "") .. min)
	-- Ternary operators FTW. Helps get rid of 'if then' stuff. Actually learned this off of Java programming:	z = (x == y ? "Yes" : "No")
	hour = ((Type == 1 and hour < 10 and "0" or "") .. tostring(Type == 0 and (hour == 0 and 12 or hour > 12 and (hour-12) or hour) or hour))
	
	-- Colon, (space if 12 hr clock)
	local c, s = ":",(Type == 0 and " " or "")

	return (hour .. c .. min .. (c .. sec or "") .. s)
end

return module

I have the impression that nobody will answer me. (Again...)

RePost #3