Mailchimp form plugin

Hey Jeremy!

Thanks for reaching out to us!

There’s actually an issue with the way the plugin is looking at lists where there are no groups present. The plugins developers are aware of the issue and will have that patched up in the next update. However, my counterpart, mc_van, wrote up a quick fix, here:

http://wordpress.org/support/topic/plugin-mailchimp-list-subscribe-form-php-invalid-argument-error?replies=5

Essentially, you’ll want to add a set of hidden groups to your list and that error should go away!

If we can help with anything else, feel free to give us a shout!

Cheers