Issue on running RefMon (Fabric Manager) from test-ms example /Multiswitch

[pythonxian]

Traceback (most recent call last):
File "/usr/local/bin/ryu-manager", line 5, in
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2749, in
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 444, in _build_master
ws.require(requires)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 725, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 628, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: ovs>=2.6.0

[Gaurav-Pande]

I am facing the same issue/error. Is there is a fix for this?

Thanks!