Support » Plugin: WooCommerce MailChimp » "not a valid interest group" error

  • I’ve recently been getting emails with the following message:

    (270) “3” is not a valid Interest Group for the list: Master Newsletter List

    I think this may follow from adding a field via the ss_wc_mailchimp_subscribe_merge_vars filter with the following code, though we were already thinking that subscriptions weren’t working before I added that:

    // Set signup source on MailChimp List
    function cf_ss_wc_signup_source_field_to_mailchimp( $order_id, $merge_vars ) {
        $merge_vars['SOURCE'] = 'Woocommerce';
        return $merge_vars;
    add_filter( 'ss_wc_mailchimp_subscribe_merge_vars' , 'cf_ss_wc_signup_source_field_to_mailchimp', 10 , 2 );

    That was adapted from the oft-referenced:

    I’ve double-checked that “SOURCE” is the correct merge tag name. I’m running WooCommerce 2.2.11 and WooCommerce MailChimp 2.3.4. (I can update but will wait until I hear back on this first.) I don’t have a “Group Name” or “Groups” specified.

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