Ads Manager 2 Lite has everything that Ads Manager 2 has except the options that allows you to sell ads and promo threads.
You can upgrade your license to Ads Manager 2 anytime by paying the difference but you won't be able to upgrade the lite version installation to the complete version, as...
Replace 'register' with 'canonical:register'
BTW, the URL will link to the register page. If you want to use a custom URL, you can replace this part: ' . $controller->buildLink('register') . ' with the actual URL.
In src/Addons/Siropu/Chat/Command on your server create a new PHP file called Register.php and paste the following code in it:
public static function run(\XF\Mvc\Controller $controller, \Siropu\Chat\Entity\Command $command...