I have the API code correctly installed and the list picked out. When I put the widget in the sidebar is appears to work fine. Except when an email is input and "Join Now" is clicked, instead of showing a confirmation message, the email submission and join now button simply disappear. No emails are submitted to the MailChimp list. I am up to date with wordpress and have tried uninstalling and reinstalling the mailchimp widget to no effect.
Can anyone help with this? I'd like to use this widget but seem to be unable.