When shipping to any US territory (Guam, Samoa, etc.) in SendSuite® Live using the carrier PB Shipping API - USPS and Priority Mail or Priority Mail Express service with a package weight over one pound, the error message "Error message: Must have exactly one CustomsInfo block." is displayed.
There is an issue with the PB Shipping API - USPS carrier and SendSuite Live versions 7.21.00 or below.
If you experience this issue, contact Pitney Bowes software support to discuss upgrading to SendSuite Live version 7.21.01.
UPDATED: October 06, 2017