I have followed the instructions you gave to an earlier poster with the same problem. The plugin does not present me with any options when I check the selector to choose groups (of which I have many). And even though it says it is connected to mailchimp, the signups do not flow through to mailchimp. What am I doing wrong please?
In an attempt to make it work I also tried installing a header/footer plugin and pasting the code from mailchimp in to the header part. No dice.
I’m also having problems with my https atm, am wondering if that’s playing into it…