When clicking the “Connect with PayPal” button in Gravity Forms settings, it is opening up a new window to log into PayPal and then nothing happens after I log in; it just shows my PayPal account. No authorization or connection is being made.
I recommend opening a support ticket for any payment-related issue, such as this one:
This is happening to me across three different sites and PayPal accounts. Never authorises, just shows PayPal account in modal dialog box.