.mc_error_msg {
        color: red;
        margin-bottom: 1.0em;
    }
    .mc_success_msg {
        color: green;
        margin-bottom: 1.0em;
    }
    .mc_merge_var{
        padding:0;
        margin:0;
    }
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function get_option() in /www/wwwroot/queendomgroup.com/wp-content/plugins/mailchimp/views/css/frontend.php:16
Stack trace:
#0 {main}
  thrown in <b>/www/wwwroot/queendomgroup.com/wp-content/plugins/mailchimp/views/css/frontend.php</b> on line <b>16</b><br />