[Plugin: Constant Contact for WordPress] Invalid argument on line 395

The widget appears but above it is says:

Warning: Invalid argument supplied for foreach() in /www/sites/bigbcomics.com/www/wp-content/plugins/constant-contact-api/functions.php on line 395

And any emails entered don’t get added to the list.

https://www.ads-software.com/extend/plugins/constant-contact-api/