500 Internal Server Error When Searching GKR Website (https://gaknowledge.org/)

When you perform an EDS search from the GKR website (https://gaknowledge.org/) you receive a 500 error. The URL in the address bar when receiving this error is: https://www.galileo.usg.edu/cgi/gkr

500 Internal Server Error
If you are the administrator of this website, then please read this web application's log file and/or the web server's log file to find out what went wrong.