I got this email from CBP this morning in response to my inquiry
Thank you for contacting the CBP Traveler Communications Center.
We apologize for the difficulty you have experienced updating your passport in your Trusted Traveler Program account. We are aware that many travelers are having difficulty with passport updates and are working to resolve the issue. We anticipate that this issue will be resolved in the next 2-3 weeks. Please try again to update your passport in that time frame, and reply directly to this message if you continue to have difficulty.
If you continue to see an error message after this time frame, you will need to visit an Enrollment Center located in a public airport or location to update your Trusted Traveler Program (TTP) account. You will not be able to schedule an appointment through your TTP account for this issue. Please contact an Enrollment Center first, in order to inquire about the current in-person visit procedure.
Contact information can be found here:
Global Entry Enrollment Centers: http://www.cbp.gov/global-entry/enrollment-centers
NEXUS Enrollment Centers: https://www.cbp.gov/travel/trusted-traveler-programs/nexus/enrollment-centers
SENTRI Enrollment Centers: https://www.cbp.gov/travel/trusted-traveler-programs/sentri/enrollment-centers
FAST Enrollment Centers: https://www.cbp.gov/travel/trusted-traveler-programs/fast/enrollment-centers
Thank you again for contacting the CBP Traveler Communications Center.
** Manage your Trusted Traveler Membership (GE, NEXUS, SENTRI, FAST, APEC) through the TTP System at https://ttp.dhs.gov/
** Information about all of our programs can be found at www.globalentry.gov
NOTE: The answers provided in this forum are for general information purposes only. Utilizing this forum does not constitute Reasonable Care under Informed Compliance guidelines.