Openstack: Create Instance fails with MessagingTimeout

We deployed Openstack-Bundle with Octavia Loadbalancer and all charms are active and fine in juju. Creation of instance fails with MessagingTimeout:

MessagingTimeout

Code
500
Details
Traceback (most recent call last): File “/usr/lib/python3/dist-packages/oslo_messaging/_drivers/amqpdriver.py”, line 433, in get return self._queues[msg_id].get(block=True, timeout=timeout) File “/usr/lib/python3/dist-packages/eventlet/queue.py”, line 322, in get return waiter.wait() File “/usr/lib/python3/dist-packages/eventlet/queue.py”, line 141, in wait return get_hub().switch() File “/usr/lib/python3/dist-packages/eventlet/hubs/hub.py”, line 313, in switch return self.greenlet.switch() _queue.Empty During handling of the above exception, another exception occurred: Traceback (most recent call last): File “/usr/lib/python3/dist-packages/nova/conductor/manager.py”, line 1520, in schedule_and_build_instances host_lists = self._schedule_instances(context, request_specs[0], File “/usr/lib/python3/dist-packages/nova/conductor/manager.py”, line 881, in _schedule_instances host_lists = self.query_client.select_destinations( File “/usr/lib/python3/dist-packages/nova/scheduler/client/query.py”, line 41, in select_destinations return self.scheduler_rpcapi.select_destinations(context, spec_obj, File “/usr/lib/python3/dist-packages/nova/scheduler/rpcapi.py”, line 160, in select_destinations return cctxt.call(ctxt, ‘select_destinations’, **msg_args) File “/usr/lib/python3/dist-packages/oslo_messaging/rpc/client.py”, line 175, in call self.transport._send(self.target, msg_ctxt, msg, File “/usr/lib/python3/dist-packages/oslo_messaging/transport.py”, line 123, in _send return self._driver.send(target, ctxt, message, File “/usr/lib/python3/dist-packages/oslo_messaging/_drivers/amqpdriver.py”, line 680, in send return self._send(target, ctxt, message, wait_for_reply, timeout, File “/usr/lib/python3/dist-packages/oslo_messaging/_drivers/amqpdriver.py”, line 669, in _send result = self._waiter.wait(msg_id, timeout, File “/usr/lib/python3/dist-packages/oslo_messaging/_drivers/amqpdriver.py”, line 559, in wait message = self.waiters.get(msg_id, timeout=timeout) File “/usr/lib/python3/dist-packages/oslo_messaging/_drivers/amqpdriver.py”, line 435, in get raise oslo_messaging.MessagingTimeout( oslo_messaging.exceptions.MessagingTimeout: Timed out waiting for a reply to message ID 87fc9aa328b64ed18c8b8f1563405a73

hi, any idea about how to fix this? I also get this error when I first create VM on ubuntu 20.04 with Ussuri,also all active and fine in juju thanks

my topic here: