Hello, Mclovin210392
1/ 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.
2/ Contact your hosting provider and ask to downgrade PHP version to 7.4.
Best Regards,
8Themes Team