After lots and lots of testing, I am wondering whether GravityForms license for non-profits has some weird restrictions built in. I tested the GravityForms on a new WordPress install, the same issue of the PayPal add-on not connecting to “live” happened. AND, I get the same issue of getting sent to a PayPal fundraising page. I tested with my own (not not-for-profit) company’s PayPal account on both the site I need to set up PayPal and the new install WP site, same thing.
In contrast, Formidable Forms’s PayPal add-on got set up with no issues on both WordPress site(s) – with either PayPal account.
Am about to give up on Gravity Forms.