when i am trying to launch an instance iam getting this error : "Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible. <class 'keystoneauth1.exceptions.discovery.DiscoveryFailure'> (HTTP 500) (Request-ID: req-ad89f44b-50c5-47b1-b1fb-d6f05bc36298)"

I did all the steps leading to launch an instance (the environment and the minimal configuration for yoga )
my architecture is composed of 2 nodes controller node and compute node as mentioned i used openstack yoga and kvm as hypervisor and here is the error in the yoga api log:
2023-06-21 13:48:46.271 104498 ERROR nova.api.openstack.wsgi keystoneauth1.exceptions.discovery.DiscoveryFailure: Could not find versioned identity endpoints when attempting to authenticate. Please check that your auth_url is correct. Unable to establish connection to https://controller/identity: HTTPSConnectionPool(host='controller', port=443): Max retries exceeded with url: /identity (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fbb95bf5630>: Failed to establish a new connection: [Errno 111] ECONNREFUSED'))
2023-06-21 13:48:46.271 104498 ERROR nova.api.openstack.wsgi
2023-06-21 13:48:46.273 104498 INFO nova.api.openstack.wsgi [req-ad89f44b-50c5-47b1-b1fb-d6f05bc36298 29fda688d1644bb0b7ad1f94bd81741c 1d3c9ac33d3142d29960fbc4958ba548 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'keystoneauth1.exceptions.discovery.DiscoveryFailure'>
2023-06-21 13:48:46.274 104498 INFO nova.osapi_compute.wsgi.server [req-ad89f44b-50c5-47b1-b1fb-d6f05bc36298 29fda688d1644bb0b7ad1f94bd81741c 1d3c9ac33d3142d29960fbc4958ba548 - default default] 10.0.0.5 "POST /v2.1/servers HTTP/1.1" status: 500 len: 658 time: 0.0212469