CC-501 error in adding an Aviator Mastercard from Barclay's credit card

Question

I am receiving a CC-501 error when attempting to add an Aviator Mastercard from Barclay's US. Other bank accounts continue to function correctly. I can download transactions are before. I just can't add a new new credit card.

NotACPA · Accepted Answer

Try using the name "Barclay's Bank Delaware" ... which is the name associated with my AAdvantage Mastercard

markjsteger · Accepted Answer

Excellent suggestion. That worked. There are three different plausible banks to try: Aviator Mastercard, Barclay's Online Banking, and Barclay's Bank Delaware. The first two gave the CC-501 error. The third one worked. Thanks.