Why does this DataStore script stop the execution completely before it reaches the end?[SOLVED]

So here's what I wrote:

local serverStorage = game:GetService('ServerStorage')
local dataStoreService = game:GetService('DataStoreService')
local statistics = dataStoreService:GetDataStore('general','statistics')

local getData = Instance.new('BindableFunction')
getData.Name = 'GetData'
getData.Parent = serverStorage

local session = {}
local DEFAULTDATA =
{
    wins = 0;
}

function getKey(user)
    assert(user and typeof(user) == 'Instance' and user:IsA('Player'),
        'first parameter for function "getKey" is of wrong type.')

    local key = 'user-'..user.UserId
    return key
end

--load:

function get(user)
    assert(user and typeof(user) == 'Instance' and user:IsA('Player'),
        'first parameter for function "get" is of wrong type.')

    local key = getKey(user)
    local success,value = pcall(function()
        return statistics:GetAsync(key)
    end) --stops execution here
    if success then
        if value ~= nil then
            return true,value
        end
    end
    return false
end

function getValue(user,request)
    assert(user and typeof(user) == 'Instance' and user:IsA('Player'),
        'first parameter for function "getValue" is of wrong type.')
    assert(request and typeof(request) == 'string',
        'second parameter for function "getValue" is of wrong type')

    local thisSession = session[user]
    if thisSession then
        if thisSession[request] ~= nil then
            return thisSession[request]
        end
    end
    return false
end

getData.OnInvoke = getValue

--initialize:

function init(user)
    assert(user and typeof(user) == 'Instance' and user:IsA('Player'),
        'first parameter for function "init" is of wrong type.')
    local success,data = get(user)
    if success then
        if data ~= nil then
            session[user] = data
        else
            session[user] = DEFAULTDATA
            saveSession()
        end
    else
        warn('Insuccessfully initialized user '..user.Name..'\'s data.')
    end
end

--save:

function saveSession(user)
    assert(user and typeof(user) == 'Instance' and user:IsA('Player'),
        'first parameter for function "saveSession" is of wrong type.')

    statistics:UpdateAsync(function(oldValue)
        local newValue = session[user] or oldValue
        return newValue
    end)
end

getData.OnInvoke = getValue

game.Players.PlayerAdded:connect(function(user)
    print('User '..user.Name..' has joined. Initializing data.')
    init(user)
end)

Well, of course, it doesn't work in play mode. But it throws the "insuccessfully initialized" warning that I put there and when I debug it, it just stops the debugging on the pcall of the function get, and therefore doesn't move on to the if success then condition(on line 33). But I can't see anything wrong with this code, and I assume it should move on to the next line after the pcall. If you have anything in mind, please post an answer or at least a comment.

Thanks,

SwaggyDuckie.