This happened to me as well and i added 3 different cards between debit cards and credit cards and nothing would go through. i finally was able to get it to go through when I changed the amount by 1 penny and then tried It. It went through Immediately hopefully this can help someone else :)
Hopefully this issue gets fixed soon because this is ridiculous. I've lost count of how many times this has happened. Thankfully I was finally able to login to this forum because I was able to find Tara's answer, and it worked! I changed my payment amount by one penny and it went through. However, I couldn't pay a penny more than my payment amount, so I had to pay a penny less which meant my payment was still overdue. But, they don't accept payments for less than 50 cents, so I had to go back and make another payment in the amount of 50 cents.