RVssl Addon on WHMCS requires you to run install Cron Update in order to have the SSL order status updated properly on your WHMCS system.
You can install RVssl Addon Cron Update either on cPanel or Terminal.
cPanel
In your cPanel, just login to cPanel of WHMCS, and visit “Cron Jobs”.
1. At “Add a New Cron Job” area, select “Once Per Five Minutes (*/5 * * * *)” from “Common Settings” drop-down list.
2. At “Command” insert the following command and “Add New Cron Job”.
*/5 * * * * php /home/whmcsrv/public_html/includes/rvcron/main.php
RVssl Addon Cron Update successfully added on your cPanel!
Terminal
SSH to your server with root privilege and open crontab
Run the following command.
*/5 * * * * php /home/whmcsrv/public_html/includes/rvcron/main.php
Done!