Hi Dipika,
Thanks for reaching out.
I have checked your website and found that you are using a much older version of the X i.e. 5.0.3 and the Cornerstone version i.e. 1.3.3. I would suggest you update the X and Cornerstone by following the below steps and checking if that helps with your issue.
- Delete the existing Cornerstone
- Update the X theme to the latest version on automatic updates
- After the X theme is updated, use the link in the dashboard to automatically install the Cornerstone. It will be at the latest version
Please remember that you are upgrading the X from a much older version, I would suggest you please copy your live site to a staging server and update the theme in staging. If everything goes fine, you can migrate the staging to the live server.
NOTE: The API for validating the license for new version of theme has been changed and that might be the reason why the connection has not been established.
Thanks