Server isn't restarted after reboot

yesterday I have updated the system to 1.3.9 ( I believe..). Today I stated octoprint, but it never started.
The log file are clean, so I doesn't find any error, but when I tried to start octoprint with:

/home/pi/oprint/bin/octoprint --host= --port=5000

I got an error message!

Traceback (most recent call last):
File "/home/pi/oprint/bin/octoprint", line 6, in
from pkg_resources import load_entry_point
File "/home/pi/oprint/local/lib/python2.7/site-packages/pkg_resources/", line 3019, in
File "/home/pi/oprint/local/lib/python2.7/site-packages/pkg_resources/", line 3003, in _call_aside
f(*args, **kwargs)
File "/home/pi/oprint/local/lib/python2.7/site-packages/pkg_resources/", line 3032, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/home/pi/oprint/local/lib/python2.7/site-packages/pkg_resources/", line 655, in _build_master
File "/home/pi/oprint/local/lib/python2.7/site-packages/pkg_resources/", line 963, in require
needed = self.resolve(parse_requirements(requirements))
File "/home/pi/oprint/local/lib/python2.7/site-packages/pkg_resources/", line 849, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'Click<6.3,>=6.2' distribution was not found and is required by OctoPrint

WhaT can I do to overcome the problem?