*** Bug 1554340 has been marked as a duplicate of this bug. ***
Moving this bug to POST for triage into Satellite 6 since the upstream issue http://projects.theforeman.org/issues/22725 has been resolved.
VERIFIED Version tested: Sat 6.4 snap 22 No error while registering client.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2018:2927