Error Running Mopidy Ubuntu Server

Hi I’m new to this service. I installed from the command line in Ubuntu Linux Server 14.04.4 lts. I’m getting this error. Traceback (most recent call last):
File “/usr/bin/mopidy”, line 5, in
from pkg_resources import load_entry_point
File “/usr/lib/python2.7/dist-packages/”, line 2749, in
working_set = WorkingSet._build_master()
File “/usr/lib/python2.7/dist-packages/”, line 446, in _build_master
return cls._build_from_requirements(requires)
File “/usr/lib/python2.7/dist-packages/”, line 459, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File “/usr/lib/python2.7/dist-packages/”, line 628, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: tornado>=3.2
Im not really familier with Python. Any ideas.

sudo apt install python-tornado