How fix this maybe outdated script that does not work anymore?

I don't know what happened but the scrip stopped working, please help, and if you are wondering how I don't know to fix it, I am a starting coder.

local severStorage = game:GetService("ServerStorage")
local DataStore = game:GetService("DataStoreService"):GetDataStore("PlayerSave3")
--------------Stats--------------
game.Players.PlayerAdded:Connect(function(player)
    --------------leaderstats and dataFolder--------------
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local dataFolder = Instance.new("Folder")
    dataFolder.Name = player.Name
    dataFolder.Parent = severStorage.RemoteData
    --------------DeathStats--------------
    local deaths = Instance.new("StringValue")
    deaths.Name = "Deaths"
    deaths.Value = DataStore:GetAsync(player.UserId).Deaths or "0"
    deaths.Parent = leaderstats

    player.CharacterAdded:Connect(function(char)
        local humanoid = char:FindFirstChild("Humanoid")
        humanoid.Died:Connect(function()
            wait(0.001)
            deaths.Value = deaths.Value + 1
        end)
    end)
    --------------TotalTimeStats--------------
    local TotalTime = Instance.new("StringValue")
    TotalTime.Name = "TotalTime"
    TotalTime.Parent = leaderstats
    TotalTime.Value = DataStore:GetAsync(player.UserId).TotalTime or "0"

    while true do 
        wait(1)
        TotalTime.Value = TotalTime.Value +1
    end
end)