You are having the issue because your X theme is out of date. Could you please update to the latest versions?
Our latest versions are:
- X theme
This latest release contains fixes for several issues so be sure to check out the changelog:
After doing the updates, always remember to clear all caches (if you are using WP Rocket, WP SuperCache or W3 Total Cache) when updating so that the code from the latest release is always in use. This will help you to avoid any potential errors.
Once you have updated, go back and check the response of @Prakash_s.
Please let us know how it goes.