Just spoke to Marriott. They tell me it is a known issue affecting certain owners. They are working to resolve the issue. Estimate one to two days.
In case anyone else is having the same problem that I am having, here is the "fix" from MVC:
Dear [__________],
Thank you for taking the time to reach out to us. We understand that you have questions about the website.
Our records show that your username [__________] is connected to a Trust account that does not have reservation rights.
Reservations booked under a Trust were causing issues during check-in. For this reason, it is necessary for you to log in under one of your sub-accounts, to book online.
You can complete this process by following the below instructions:
1. Go to
www.marriottvacationclub.com
2. Click on
Owner Login.
3. Create a
New Account. (Each Owner must have separate logins.)
4. Enter in a new, unique username and a new password that meets the following requirements:
Minimum of eight characters
At least one uppercase letter
At least one lowercase letter
At least one number
At least one special character
5. Choose how you want your confirmation link sent (SMS text message or email); then access the email or text message and click the link listed. (Do not access your activation email using a third-party email host, such as Window Live Mail.) This link will take you to the Connect Ownership page.
6. Please use the following information, exactly as it appears below, to complete the process of connecting your Ownership account online:
First Name: [__________]
Last Name: [__________]
Customer ID:[__________]
We apologize for any inconvenience this may have caused and appreciate your patience and understanding.
Have a wonderful day, and please do not hesitate to contact us with any questions or concerns. You can reply to this email, or you may also speak directly to a Vacation Ownership Advisor at 855-682-4847. They are here to assist Monday through Friday from 9 a.m. until 5 p.m. Eastern Time.