The GUI works fine and is visible on my screen but whenever I try to share the UxPlay window on its own without sharing my entire screen, it doesn't appear on the options.
Have a look at #7 which describes a related problem. If you manually assign a window title as described there, it at least works to share from browsers.
The GUI works fine and is visible on my screen but whenever I try to share the UxPlay window on its own without sharing my entire screen, it doesn't appear on the options.