I found a bug in the current version where you cannot create a campaign when there are interests selected. If we log the responses from mailchimp we get the error “Required fields were not provided: condition_type”
I am guessing MailChimp has updated the API to require a new field when using the segment_opts field.
The fix for this is changing line 785 of the file classes/plugin.class.php from: $conditions = array('field'=>'interests-'.$group, 'op'=>'interestcontains', 'value'=> $interests);
to $conditions = array('condition_type'=>'Interests', 'field'=>'interests-'.$group, 'op'=>'interestcontains', 'value'=> $interests);
Can we get this fix in the next release? Or a temporary release with this bug fixed?