I do see the "invalid handle" message on your profile; it looks similar to what mine showed.

We have confirmed an ongoing system outage that may cause issues such as (but not limited to) login difficulties, “Invalid Handle” error messages, and search functionality problems. Our team is actively working to resolve the issue, and we appreciate your patience and understanding during this time.

Thank you for the clear instructions! Support wrote me back and said the "invalid handle" was an issue on their side. It's working now. Thanks again!