Make sure that the images you are using are clear and well-lit, with the faces in the center of the frame. You could also try using different images to see if that makes a difference.
Also, make sure that you have an excellent and stable internet connection, as the loading issues can affect face recognition too.
Additionally, you could reach out to Gio's customer support for further assistance in troubleshooting the issue. They may be able to provide more specific advice based on the details of your situation.