I gotcha. You are right, that’s not the issue. I just got an email from a client. He said he probably put in the wrong billing address. He never got an email when clicked “Pay $700.00” button. I had to ask him to try again with the correct billing address. He just got an email and I got no error this time.
I removed CDN, cleared cache, deactivated & reactivated the plugin. Still doesn’t work. Please advise.