TemplateSyntaxError: 'wagtailmarkdown' is not a valid tag library: ImportError raised loading wagtailmarkdown.templatetags.wagtailmarkdown: No module named utils

[bashu]

Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "/home/vagrant/.virtualenv/local/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 63, in __call__
    return self.application(environ, start_response)
...
  File "/home/vagrant/.virtualenv/local/lib/python2.7/site-packages/django/template/base.py", line 342, in parse
    compiled_result = compile_func(self, token)
  File "/home/vagrant/.virtualenv/local/lib/python2.7/site-packages/django/template/defaulttags.py", line 1163, in load
    (taglib, e))
TemplateSyntaxError: 'wagtailmarkdown' is not a valid tag library: ImportError raised loading wagtailmarkdown.templatetags.wagtailmarkdown: No module named utils