Error "Warning: array_values() expects parameter 1…"

I just had the site I was working with go live suddenly (someone changed the arecord prematurely, long story). The first product displays on the page and works as planned, however, other products come up with the following error whenever you try to reserve or click for more detail :

Warning: array_values() expects parameter 1 to be array, null given in /home/content/12/10818912/html/wp-content/plugins/inventory/ssi/display_functions.php on line 663

Warning: array_shift() expects parameter 1 to be array, null given in /home/content/12/10818912/html/wp-content/plugins/inventory/ssi/display_functions.php on line 663

Warning: Invalid argument supplied for foreach() in /home/content/12/10818912/html/wp-content/plugins/inventory/ssi/display_functions.php on line 664

This is the same site that I just got information from you regarding style sheet Ul / li bullet images. I thought the plug in installed with errors, but you thought it was ok. Please advice. This site is live now.

http://www.cleangreenengines.com/parts-and-supplies/

http://wordpress.org/extend/plugins/grid-products/