When people submit their email addresses my Mailchimp list is not getting updated. I have recently installed Gravity forms and the add-on so it is not a new issue, it has never worked.
I've trawled through the support forum and have checked that the versions of Wordpress and Gravity Forms are all the latest, tested theme and plugins, and checked my API key.
I'm new to Mailchimp so don't know if any of my settings there may interfere with Gravity forms but my list is a pretty simple email sign-up.