There is js error, check the screenshot in the Private Content area, you need to solve it.
There is no such problem on our test sites or on sites of other our customers.
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.
For example – https://wordpress.org/support/topic/error-jquery-6/
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.