This happened to me yesterday. The US major bank credit card I've used on Amazon for 10-20 years got the same message. I have a positive balance here so there is NO reason for Amazon to charge the card in the first place. I also contacted my credit card company and was told there was absolutely no problem with the card; other charges on it processed fine. I was furious because I had a pending order that I could not ship nor even see; my entire account was shut down and I could not even see the buyers address to ship outside the system. In fact, I could not see ANY orders at all. "seller support" could not help in any way whatsoever, telling me they could not tell me why it happened to a perfectly functioning card; they then parroted the same boilerplate you listed here, among others, none of which applies to an active card used on Amazon for decades. I finally added a different banks debit (isn't that considered a bad option !?!?!?) card that I do not want to use for this purpose, and that solved the problem. Seller support contacted me that the issue was completed, although I solved it myself and they could give me no assistance with what the issue was. I will have to shut my business down and try re-adding my original card in the next few days, since this error in Amazon's system then blocks all access to my orders and shipping on both my desktop and phone app. It is totally unacceptable and could have destroyed my performance.

Then later in the day, I got an email stating that Amazon could not deposit to my 20 year old bank account (completely different bank). This is apparently a network error on the Amazon side and should never have blocked access to my orders and shipping.