Now the "Server Error" - Bugzilla

I should say this is really a vague error, which doesn't give you any clue. I spent almost 10 researching on this error.

Finally I found that, this is something to do with permissions. The webserver should have the permissions to execute these cgi and pl codes.
Altered the obj.config file in netscape webserver (to include LD_LIBRARY_PATH)

Use
chown -R netscape:netscape bugzilla-2.20
get inside the *2.20 directory
chmod 777 * ( Note this is only for testing, make sure you block the localconfig and other pl files, this can cause sever security issues)