Getting NoMethodError on find_by method

So I have the same award nomination project in several locations with
several servers and I’m getting a NoMethodError when using find_by on
only some of them. With webrick and FastCGI on my remote server, the
line find_by_nominee_id_and_award_id works fine. With Lighttpd on my
remote server and CGI on the local server I’m currently putting
together, I’m getting a NoMethodError. This leads me to believe my
lighttpd install and my local server are missing some gem or plugin to
allow find_by to work, but I’ve yet to find any documentation starting
so or otherwise.

Anyone have a clue why this method seems so finnicky?