Hello,
Do you mean the problem is that you can’t Publish Theme Options settings https://prnt.sc/V3L6OigGB3Zb ?
Please try to disable all the third-party plugins (including cache plugins), that does 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.
Let us know the result.
Best Regards,
8Themes Team