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.
If the situation is independent of plugins, provide FTP access.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.