Hi. We just updated a WPforms form with Paypal Standard and set for the sandbox. Filling out an submitting the edited form produces "We can't complete this donation. The receiver doesn't have a valid PayPal account."
We've used Paypal with these forms before, but not using the Paypal Standard plugin for WPForms.
We checked "Check this option if you want to enable PayPal sandbox for testing"
What settings, either on PayPal or WPForms, should I check to resolve this?
