Error showing in order emails.

 I am seeing the following error message on order emails:

"Warning: Invalid argument supplied for foreach() in /home/WEBSITE/public_html/headstones/wp-content/plugins/fancy-product-designer/woo/class-wc-cart.php on line 390

 That particular line has the following code:

foreach($views as $view) {

 I did not see this error in an email I sent yesterday before I updated to 4.6.4.