Subscription class not in autoloader about ringcentral-php HOT 12 CLOSED

use RC\subscription\Subscription;

PHP Fatal error:  Call to protected method RC\subscription\Subscription::notify() from context 'Pubnub\Pubnub' in /home/rafael/PhpstormProjects/ringcentral-vm/vendor/pubnub/pubnub/composer/lib/Pubnub/Pubnub.php on line 468
PHP Stack trace:
PHP   1. {main}() /home/rafael/PhpstormProjects/ringcentral-vm/program.php:0
PHP   2. VMDownloader->startListener() /home/rafael/PhpstormProjects/ringcentral-vm/program.php:62
PHP   3. RC\subscription\Subscription->register($options = *uninitialized*) /home/rafael/PhpstormProjects/ringcentral-vm/program.php:44
PHP   4. RC\subscription\Subscription->subscribe($options = *uninitialized*) /home/rafael/PhpstormProjects/ringcentral-vm/vendor/ringcentral/php-sdk/lib/RC/subscription/Subscription.php:76
PHP   5. RC\subscription\Subscription->subscribeAtPubnub() /home/rafael/PhpstormProjects/ringcentral-vm/vendor/ringcentral/php-sdk/lib/RC/subscription/Subscription.php:119
PHP   6. Pubnub\Pubnub->subscribe($channel = *uninitialized*, $callback = *uninitialized*, $timeToken = *uninitialized*, $presence = *uninitialized*) /home/rafael/PhpstormProjects/ringcentral-vm/vendor/ringcentral/php-sdk/lib/RC/subscription/Subscription.php:241
PHP   7. Pubnub\Pubnub->_subscribe($channel = *uninitialized*, $channelGroup = *uninitialized*, $callback = *uninitialized*, $timeToken = *uninitialized*, $presence = *uninitialized*) /home/rafael/PhpstormProjects/ringcentral-vm/vendor/pubnub/pubnub/composer/lib/Pubnub/Pubnub.php:365

<?php

require_once('vendor/autoload.php');

use \RC\SDK;
use \RC\subscription\events\NotificationEvent;
use \RC\subscription\Subscription;

class VMDownloader
{
    // Configuration
    const KEY         = 'my_app_key';
    const SECRET      = 'my_app_secret';
    const SERVER      = 'https://platform.devtest.ringcentral.com';
    const MAIN_NUMBER = 'my_username';
    const PASSWORD    = 'my_password';

    private $sdk;

    function __construct()
    {
        $this->sdk = new SDK(self::KEY, self::SECRET, self::SERVER);
        $this->sdk->getPlatform()->authorize(self::MAIN_NUMBER, '', self::PASSWORD, true);
    }

    public function getVoicemails()
    {
        return $this->sdk->getPlatform()
            ->get('/account/~/extension/~/message-store', ['messageType' => 'VoiceMail'])
            ->getJson();
    }

    /**
     * Listens for new messages
     */
    public function startListener()
    {
        $this->sdk->getSubscription()
            ->addEvents(['/restapi/v1.0/account/~/extension/~/message-store'])
            ->on(Subscription::EVENT_NOTIFICATION, function (NotificationEvent $e) {

                print_r($e->getPayload());

                // TODO: Add curl downloader

            })
            ->register();
    }

    /**
     * @todo finish function definition
     */
    private function download()
    {
    }

    function __destructor()
    {
        print 'Destroyed';
    }
}

$t = new VMDownloader();

$t->startListener();