Bummer.

Maybe you could ask your tech team to change the error messaging when that is the cause.

An error message that reads, "There was a problem with your credit card information. Please try again or try a different card." serves to let users know there was a problem with the card. This is also what I was told by 2 different Hyatt employees via phone and DM on Twitter. Your fellow colleagues appear confused by the error message being returned as well.

It would be helpful to all involved if the error message read, "Your World of Hyatt account has to be opened at least 60 days before you can purchase points."

That would save people from having to go onto travel message boards to decipher what is actually going wrong.