Upstream has release Heat 6.1.0; RHOS 9 is currently based on 6.0.0 with patches.
Launchpad bugs for the issues mentioned in the Doc Text:
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.