Hi izzettin,That seems pretty fundamental; are you sure you're trying to authenticate this with the correct user? I'd be checking keystone configuration and logs to see what's going on.Thanks,DavidOn Fri, May 15, 2020 at 10:27 AM İzzettin Erdem <root.mch@gmail.com> wrote:Hello everyone,When I launch a cluster on Sahara, it gives a heat stack authorization error. I also use Murano service and it is working with heat. I could not find the solution and I discuss this error with the Sahara-devel team. They are also searching for this. Could you help me, please?Both the error log of Sahara and Heat are below.Sahara-engine:Heat-engine:Thanks. Regards.