A Kintera Thon event through Blackbaud Sphere is created with Participant Registration enabled. Supporters access the registration link from the Kintera Thon event page. After entering the contact information and clicking Submit, the payment information screen displays. Once the user enters his or her credit card information and clicks Submit, the user receives "An unexpected error has occurred".
This could be caused by connection issues, address verification, a server timeout, or custom coding. After the user receives the error, please copy the error page's url (there will be an error ID in the address) and Click Create a Case in the Additional Assistance box on the right and include this solution ID in the case description.