I am trying to setup cloudkitty with devstack(now master-pike)

the installation was successfull but in dashboard I get this error

Request Method: GET Request URL: http://<ip-addr>/dashboard/ Django Version: 1.11.3 Exception Type: ImportError Exception Value:
cannot import name patterns Exception Location: /opt/stack/cloudkitty-dashboard/cloudkittydashboard/overrides.py in <module>, line 17 Python Executable: /usr/bin/python Python Version: 2.7.12 Python Path:
['/opt/stack/horizon', '/opt/stack/horizon', '/opt/stack/keystone', '/opt/stack/glance', '/opt/stack/cinder', '/opt/stack/neutron', '/opt/stack/nova', '/opt/stack/horizon', '/opt/stack/tempest', '/opt/stack/ceilometer', '/opt/stack/cloudkitty', '/opt/stack/python-cloudkittyclient', '/opt/stack/cloudkitty-dashboard', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/opt/stack/horizon/openstack_dashboard'] Server time: Sun, 6 Aug 2017 03:27:51 +0000

how to solve this issue??