"Internal Error" message popping up when PayPal Pro form is being submitted.

Hello, it seems as if customers are having difficulties when trying to submit and pay for their registration. When you fill the registration form out, put your credit card information in, and hit the "Pay Now" button, instead of it going through and saying "Thank You", it is saying "Internal Error". Please help

I have tried submitting your form, but it seems OK for me.

Can you please tell us if you are still experiencing this issue and if so, can you please grab a screenshot of the entire page - with the error?

Also, are there any specific options that should be selected before submitting?