Sorry for replying late. Adobe had a shutdown during the July 4th week.
According to our server log, it looks like the PayPal merchant account you are paying to has been restricted, which means PayPal has restricted the account's ability to accept payments. Could you double check if the form you were checking out is this one? (https://adobeformscentral.com/?f=Z6ImanVSGu4nN6YHfHdPYQ) If that is indeed the form you used to make payments, you'd better contact the form owner to let him/her know that his/her PayPal account has been restricted by PayPal and cannot accept payments. He/She will need to contact PayPal in order to know the reason why his/her account is restricted.
Senior Computer Scientist
Adobe Systems Incorporated