Urgent fix to cgiemail script form errors on website.

I am looking for urgent help with a cgiemail script form issue on our nonprofit organization's website. Specifically, the form is not submitting after just a recent site-wide update that broke some code. My website is a custom-built one hosted on a VPS server by Hostgator. We need someone to quickly identify and resolve the error, so that we can have our web forms working again immediately.