BillVick on "[Plugin: WP RSS Aggregator] MySql error..."

I'm running the RSS Feed Aggregator and getting the following error.

### Begin System Info ###

## Please include this information when posting support requests ##

Multi-site: No

SITE_URL: http://www.billvick.com
HOME_URL: http://www.billvick.com

Plugin Version: 4.6.13
WordPress Version: 4.1.1

PHP Version: 5.4.38
MySQL Version:
<b>Fatal error</b>: Class 'mysqli' not found in <b>/home/billvick/public_html/wp-content/plugins/wp-rss-aggregator/includes/system-info.php</b> on line <b>69</b>

https://wordpress.org/plugins/wp-rss-aggregator/