Hi EventClinics,
Welcome to the Community Forum! So sorry to hear about the issue you're having with the error message showing when your users are trying to send a guest transaction.
As the issue you're describing is of a technical nature, I would recommend filing a ticket at our Merchant Technical Support site www.paypal.com/MTS immediately.
If you don't receive a response to your ticket in due course, you can tweet the problem and ticket number to PayPal MTS on Twitter @PayPal_MTS. Our colleagues will be delighted to help with this issue.
Hope this helps,
Sophie
... View more