Hello,
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.
If the problem is not caused by plugins, provide temporary wp-admin access, so we can take a closer look.
Regards