Error creating new machine in virt-manager

[Mustafa Muhammad]

Creating new machine in virt-manager I get:
Error launching manager: 'NoneType' object has no attribute 'get_default_storage_format'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 889, in _do_show_create
    self._get_create_dialog().show(src.topwin, uri)
  File "/usr/share/virt-manager/virtManager/create.py", line 170, in show
    self.reset_state(uri)
  File "/usr/share/virt-manager/virtManager/create.py", line 393, in reset_state
    self.addstorage.reset_state()
  File "/usr/share/virt-manager/virtManager/addstorage.py", line 196, in reset_state
    fmt = self.conn.get_default_storage_format()
AttributeError: 'NoneType' object has no attribute 'get_default_storage_format'

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: virt-manager 1:1.0.1-5ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Oct 18 21:12:59 2015
InstallationDate: Installed on 2015-10-18 (0 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150924)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US.utf8
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
SourcePackage: virt-manager
UpgradeStatus: No upgrade log present (probably fresh install)