Plugin Problem on Sidebar (Twitter)

i’m not sure why, but my Twitter Widget Pro keeps working half the time and the other half of the time this is displayed in the right sidebar where the widget should be.

Warning: Invalid argument supplied for foreach() in /home/jheathco/domains/currentdose.com/public_html/wp-content/plugins/twitter-widget-pro/wp-twitter-widget.php on line 332

any advice?
thanks!