2019-02-04 04:53:55,223 1866 ERROR ? werkzeug: Error on request:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 193, in run_wsgi
    execute(self.server.app)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 181, in execute
    application_iter = app(environ, start_response)
  File "/home/odoo/odoo-dev/odoo/odoo/service/server.py", line 247, in app
    return self.app(e, s)
  File "/home/odoo/odoo-dev/odoo/odoo/service/wsgi_server.py", line 186, in application
    return application_unproxied(environ, start_response)
  File "/home/odoo/odoo-dev/odoo/odoo/service/wsgi_server.py", line 172, in application_unproxied
    result = handler(environ, start_response)
  File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 1325, in __call__
    self.load_addons()
  File "/home/odoo/odoo-dev/odoo/odoo/http.py", line 1346, in load_addons
    m = __import__('odoo.addons.' + module)
  File "/home/odoo/odoo-dev/odoo/odoo/modules/module.py", line 81, in load_module
    execfile(modfile, new_mod.__dict__)
  File "/home/odoo/odoo-dev/odoo/addons/website_crm_partner_assign/__init__.py", line 7, in <module>
    import tests
  File "/home/odoo/odoo-dev/odoo/addons/website_crm_partner_assign/tests/__init__.py", line 4, in <module>
    from . import test_partner_assign
  File "/home/odoo/odoo-dev/odoo/addons/website_crm_partner_assign/tests/test_partner_assign.py", line 4, in <module>
    from mock import patch
  File "/usr/local/lib/python2.7/dist-packages/mock/__init__.py", line 2, in <module>
    import mock.mock as _mock
  File "/usr/local/lib/python2.7/dist-packages/mock/mock.py", line 69, in <module>
    from pbr.version import VersionInfo
ImportError: No module named pbr.version