Verified that href attributes of Foreman provider points to correct locations https://<address>/api/providers?provider_class=provider and https://<address>/api/providers/:id?provider_class=provider
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-2017:1367