The "Download RHCOS ISO button" goes to 404 Not Found. With OpenShift 4.6, the iso file name pattern changed and includes an extra "live" string in the filename. https://cloud.redhat.com/openshift/install/metal/user-provisioned
moving to ART team as the original link provided to OCM is broken and the ISO file was renamed.
This is a duplicate of bug 1912588 which I turned into https://issues.redhat.com/browse/SDA-3586 because I couldn't find the right place for a BZ. RHCOS changed the name of the ISO between 4.5 and 4.6, so that's what it's published as now. I think anything on OCM that's pointing at https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/latest/latest/rhcos-installer.x86_64.iso now needs to point at https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/latest/latest/rhcos-live.x86_64.iso (If there are links specific to 4.5 and before, they can of course remain the same.)
As the card SDA-3586 fixed the bug, the rhcos download links have been changed to https://mirror.openshift.com/pub/openshift-v4/ppc64le/dependencies/rhcos/latest/latest/xxxxxxx. So move the bug to verified.