Adam Anderly

This indicates the API key might not be correct. Have you saved the API key and refreshed the screen?

See this post for an example of adding a field: https://wordpress.org/support/topic/add-another-field?replies=9#post-6560225

This indicates that you have a merge field setup called ADDRESS and have marked it as required. This plugin does not natively send ADDRESS so you should either mark the field as not required or check the following thread on how to add the additional fields: https://wordpress.org/support/topic/add-another-field?replies=9#post-6560225

Hello. This is a free plugin and support is offered as we can get to it. The plugin is still supported and will be updated in the near future with some additional features and to work with the latest version of the MailChimp API.

All, I just tested the current plugin version (1.3.6) on a fresh install of WordPress 4.4 with the latest version of WooCommerce (2.4.12) and it appears to be working fine. If you can, please send me your install details here: http://anderly.com/contact

Please include WordPress version, WooCommerce Version, Plugin Version, PHP Version and the WebHost you’re on.

I’d love to help you all get it working if we can.

Cheers,

Adam

Shooting for January.

The grouping name should go in the first box and the different groupings should be comma-separated in the second box.

This should do the trick:

// tie into the WooCommerce MailChimp 'ss_wc_mailchimp_subscribe_merge_vars' action filter to modify the MailChimp merge vars
function ss_wc_modify_mailchimp_merge_fields( $merge_vars, $order_id ) {
    // By default $merge_vars will look like array( 'FNAME' => 'Joe', 'LNAME' => 'Smith', 'EMAIL' => 'joe.smith@example.com' );

    // Retrieve the WooCommerce order
    $order = new WC_Order( $order_id );

    // Get the order billing address
    $billing_address = $order->get_address( 'billing' );

    // Get the billing address state
    $state = $billing_address[ 'state' ];

    // let's add a new 'STATE' merge field - NOTE: You'll need to change this to the actual name
    // of your merge field in MailChimp
    $merge_vars[ 'STATE' ] = $state;

    return $merge_vars;
}
add_filter( 'ss_wc_mailchimp_subscribe_merge_vars' , 'ss_wc_modify_mailchimp_merge_fields', 10 , 2 );