Tried to list for this flight on myidtravel.com and I get the following ( Additional Information Embargo: Routing not permitted ) that says I can't list for it? Does anyone know why?

Can I show up at the airport and list the day of? There are plenty of seats on both legs. What gives? Yes, I'm CASS approved and know that there is no actual cockpit jumpseat authorized on international but a seat in the back should still be allowed, no?

Any insight or procedures I'm missing would be greatly appreciated. I called the nonrev line and both times, 2 different people had no clue.

Flight Number AA933
Airline American Airlines
Date 24 Jan 2018
Departure 15:50 from MIAMI INTERNATIONAL APT
Arrival 20:19 at GUAYAQUIL JOSE JOAQUIN DE OLMEDO
Aircraft Type 738
Seats available J7 R7 D7 I7 Y7 B0 H7 K7 M7 L7 G7 V7 S7 N7 Q7 O7 E7
Additional Information Embargo: Routing not permitted


Total duration MIAMI INTERNATIONAL APT to GUAYAQUIL JOSE JOAQUIN DE OLMEDO: 4:29