3812840 - Why did I receive the error "Issue with your credit card" when booking an Amtrak ticket with my company ghost card?

I was booking an Amtrak ticket with my company's ghost card, and I received message stating:

We're Sorry.... We encountered an issue that prevented us from completing your request.  We have experienced an issue with your Amtrak reservation. While attempting to ticket your reservation, a failure occurred. Your reservation is confirmed but not ticketed and the Amtrak record locator is XXXXXX. Please contact Amtrak customer service at 800-USA-RAIL or your travel agency for assistance with ticketing this reservation. Concur Travel will continue attempting to issue your ticket, but the only way to guarantee the ticket is confirmed is by contacting the agency or Amtrak directly.

The Amtrak Ticketing System returned the following error :  Issue with your credit card

User error recieved: Issue with your credit card Error found in logs: 64CUNABLE TO PROCESS TRY AGAIN LATER , KBA , CON-SRV-TRV-RAL , Rail , Problem