If your client is getting error message while booking a pre-paid appointment
The seller accepts encrypted website payments only. You cannot pay the seller through un-encrypted buttons. Please contact your seller for more details.
Then, this error is displayed because your PayPal Account Profile is set to only accept payments from "encrypted" buttons however, your item button code is "not" encrypted. This condition interrupts the payment process and displays the error message.
To turn off this option:
1. Log in to your PayPal Account.
2. Click "Profile" tab or "Edit Profile" link.
3. Under "Selling Preferences", select "Website Payment Preferences".
4. In the section titled "Encrypted Website Payments" select "Off".
5. Click "Save".
Should you need any assistance, please don't hesitate to contact us at firstname.lastname@example.org