Guys I followed the procedures and updated the packages and the libvirt-qemu user is removed from nova group but still getting the same error. The image type is raw not qcow2 though. Here are the logs:

2020-10-31 17:41:15.579 1735 INFO nova.compute.manager [req-4a879436-1412-45ad-b461-12aaceec4a72 53151ac9de83404882af6c50c66c0278 adf11129db9f4dc494a848389f1d82e0 - 29dc2dc4b31344cfbbb7e896e44026d6 29dc2dc4b31344cfbbb7e896e44026d6] [instance: e05d55df-85e2-44e7-8ea7-f7f060fbc3ba] Successfully reverted task state from image_pending_upload on failure for instance.
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server [req-4a879436-1412-45ad-b461-12aaceec4a72 53151ac9de83404882af6c50c66c0278 adf11129db9f4dc494a848389f1d82e0 - 29dc2dc4b31344cfbbb7e896e44026d6 29dc2dc4b31344cfbbb7e896e44026d6] Exception during message handling: libvirt.libvirtError: unable to verify existence of block copy target: Permission denied
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2432, in snapshot
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     metadata['location'] = root_disk.direct_snapshot(
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/imagebackend.py", line 452, in direct_snapshot
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     raise NotImplementedError(_('direct_snapshot() is not implemented'))
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server NotImplementedError: direct_snapshot() is not implemented
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server During handling of the above exception, another exception occurred:
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_messaging/rpc/dispatcher.py", line 276, in dispatch
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_messaging/rpc/dispatcher.py", line 196, in _do_dispatch
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/exception_wrapper.py", line 77, in wrapped
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     _emit_exception_notification(
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self.force_reraise()
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     raise value
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/exception_wrapper.py", line 69, in wrapped
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return f(self, context, *args, **kw)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 188, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     LOG.warning("Failed to revert task state for instance. "
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self.force_reraise()
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     raise value
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 159, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/utils.py", line 1447, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 216, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     compute_utils.add_instance_fault_from_exc(context,
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self.force_reraise()
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     raise value
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 205, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 236, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     compute_utils.delete_image(
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self.force_reraise()
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     raise value
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 232, in decorated_function
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return function(self, context, image_id, instance,
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 3879, in snapshot_instance
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self._snapshot_instance(context, image_id, instance,
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 3912, in _snapshot_instance
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self.driver.snapshot(context, instance, image_id,
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2471, in snapshot
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     self._live_snapshot(context, instance, guest,
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2680, in _live_snapshot
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     dev.rebase(disk_delta, copy=True, reuse_ext=True, shallow=True)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/nova/virt/libvirt/guest.py", line 815, in rebase
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     return self._guest._domain.blockRebase(
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 193, in doit
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     result = proxy_call(self._autowrap, f, *args, **kwargs)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 151, in proxy_call
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     rv = execute(f, *args, **kwargs)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 132, in execute
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     six.reraise(c, e, tb)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     raise value
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 86, in tworker
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     rv = meth(*args, **kwargs)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/libvirt.py", line 1079, in blockRebase
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server     if ret == -1: raise libvirtError ('virDomainBlockRebase() failed', dom=self)
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server libvirt.libvirtError: unable to verify existence of block copy target: Permission denied
2020-10-31 17:41:15.583 1735 ERROR oslo_messaging.rpc.server