Probably you have updated WordPress to the latest version, but the theme is outdated.
Make sure your theme and all the plugins are updated. You can find update documentation here. If this doesn’t help, please share your wp-admin login details, so I can check this issue in action.
If you share any sensitive data, don’t forget to mark reply as private below.
Thank you for getting back to me, and sorry for the delay response.
Today I just updated the theme to the latest version 1.0.18.
However, the problem still persist.
I will share my wp-admin login detail on the 2nd reply.
The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.