Login Screen?

I am setting up 6.0.2 in preparation for Southern California's contest next weekend. We run on Fedora, in this case Fedora 28. I installed DOMjudge to /opt/domjudge, configured MariaDB, and copied the Apache configuration file to /etc/httpd/conf.d. I can connect to localhost/domjudge and I see the default scoreboard. However, when I click "Login", I get a blank screen! As far as I can tell everything is there. Does anyone have any ideas about what might be going on? Marc