Error 404: Page Not Found

Chroot fedora-31 does not exist in superboum/chez-scheme.
Available chroots:
rhel-9-x86_64
fedora-39-x86_64
epel-9-x86_64
fedora-38-x86_64
fedora-37-x86_64
epel-6-x86_64
fedora-rawhide-x86_64
centos-stream-9-x86_64
centos-stream-8-x86_64
epel-7-x86_64
fedora-40-x86_64
epel-8-x86_64