SAT Subject Test Registration

I am an international student trying to apply for the December World History SAT Subject Test, yesterday I applied for my other two subject tests and my SAT. My card has worked on the others but it isn’t working for this one. I have enough money in my account. Wondering if it is a case of me using a debit instead of a credit card but as I said it worked for the others.

That’s a College Board issue. Contact them.
https://collegereadiness.collegeboard.org/contact-us
Closing thread.