Hello, @xyz,
There is some issue with your theme options, its not publishing, it seems to be the third-party plugin confliction issue, please try to disable all the third-party plugins (including cache plugins), that do not come bundled with XStore https://xstore.helpscoutdocs.com/article/36-included-plugins, clear the cache of the browser, and check then. Maybe one of the additional plugins is the reason for the problem. After that reset the Fonts from Theme Settings >> Typography and publish it.
And if the issue will still persist then please remain all the third-party plugins deactivated on your site and allow permission to debug your site which includes deactivating all the third-party plugins and on-site Customization as well so that I will check and assist you accordingly.
Note: Please take the complete backup of your site first.
Regards 8Themes Team.