Header Error Message coming from class-people-contact.php

Receiving this error message still after updating plug-in today:

Warning: Cannot modify header information – headers already sent by (output started at /home/xxxx/xxxxxxx.com/wp-content/plugins/contact-us-page-contact-people/classes/class-people-contact.php:219) in /home/xxxxx/xxxxx.com/wp-includes/pluggable.php on line 876

http://ww.wp.xz.cn/extend/plugins/contact-us-page-contact-people/