I don't want to post the link in a public forum - but I'm talking about the standard name change long-form that we have been using for several months. Clarification: In case you aren't aware, Vistana owners get standard 8-digit Marriott confirmations for Vistana timeshare reservations, and have been for a long time.
Update - A Marriott owner has informed me that the form now requires a Marriott password to access. I don't think they thought about Vistana owners. (Not a Bonvoy password - a Marriott password.) So I withdraw my question - it's not what I wanted to hear, but at least now I know what the problem is.
Thanks, Cinderella