Why isn't my Fast Secure Contact form plugin not sending emails?

Hey there,

Before, I was able to receive emails from the plugin before with no problems. Now it doesn’t seem to be working anymore. When I try to send myself a test email and hit the submit button, it would just load and spin and the sending wouldn’t complete. Can you assist me in what is causing this?

The plugin is called “Fast Secure Contact Form” and the domain is http://www.lightbulbvideography.com.

Hosting server is Godaddy.