Justin, Re "what email address did you put in the section for PayPal payments", in the back office of Restrict Content Pro. As in the image below. This is the only place I have put an email. It is the emal of my Paypal account. The error message occurs when I click the "Register" button on the Register page. This is the error message. Yes, I have "Sandbox Mode" checked in the Restrict Content Pro setting area. The error does not occur when "Sandbox Mode" is unchecked. The live Paypal checkout login window appears. To Summarize, I have a Paypal Business account. The error occurs upon clicking the Register button, before any emails are entered. Best, Hank
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