Got the following response when I questioned this.




Thank you for contacting Marriott.

Please accept our apology for the difficulty you encountered while using Marriott.com. We are eager to ensure that Marriott.com is a productive part of your travel planning process.

We have recently been receiving messages of this error occurring and have notified our web developers, who are currently working to correct this problem.



If you need additional assistance online, please feel free to reply to this email or contact an Internet Customer Care Associate by phone, toll free, at 800-721-7033. We are available to help you 24 hours per day, 7 days a week.

For our international guests, a listing of international reservation offices is available at the following site:

https://marriott.com/reservation/worldnum.mi

We apologize for any inconvenience this may cause.

If we can be of further assistance, we invite you to reply to this email.

Regards,
Bryan Cogar
Marriott Internet Customer Care