I just updated the plug in . . . but still 404 error. I even removed the email I used as a subscriber then subscribed again with the same email. 404 error.
Yet I receive an email and this time, the double opt in works, but when I click the confirmation link, I am sent to a 404 error page, even though the hyperlink says “confirmed” so I’m pretty sure it’s been confirmed, because I recieve a confirmation email afterwards.
Still trying to figure out when the follow up emails will be sent. Those haven’t worked out yet.