Hello, @Siv,
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.
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.
Please also share your site WP Admin URL and Credentials with me as well in the private content area of this topic as listed below, so that I will look into it for you on your site.
WP Admin URL:
WP Admin Username:
WP Admin Password:
Regards 8Themes Team.