Hi,
I’ve got the same problem as well when upgrading to WordPress 3.6.x
Error message is:
Warning: require_once(miniMCAPI.class.php): failed to open stream: No such file or directory in /var/www/html/wp-content/plugins/mailchimp/mailchimp.php on line 38 Fatal error: require_once(): Failed opening required ‘miniMCAPI.class.php’ (include_path=’.:/usr/share/pear:/usr/share/php’) in /var/www/html/wp-content/plugins/mailchimp/mailchimp.php on line 38
