Error Message when submitting

Hi,

I have recently installed Constant Contact and I am using the sign up widget.

Everything works fine, until I submit the form. Then the error messages at the top come up saying:

Warning: Wrong parameter count for array_unique() in /var/sites/d/dailynach.com/public_html/wp-content/plugins/constant-contact-api/functions.php on line 871

Warning: Invalid argument supplied for foreach() in /var/sites/d/dailynach.com/public_html/wp-content/plugins/constant-contact-api/functions.php on line 877

Here is a link to the website: http://dailynach.com/contact-us/, the widget is on the right panel.

Thanks in advance

http://ww.wp.xz.cn/plugins/constant-contact-api/