Wet Shave Club Design Error: 'css' is undefined

Triggered by: head.html (line 13)

  11. {% endif %}
  12. 
> 13. {{ css.base() }}
  14. {{ '/css/bootstrap.css' | asset_url | stylesheet_tag }}
  15. {{ '/css/jquery.fancybox.css' | asset_url | stylesheet_tag }}

Stack Trace:

Traceback (most recent call last):
  File "/usr/src/app/src/cratejoy/cratejoy/theme/render.py", line 401, in render_page
    output = tpl.render(**kwargs)
  File "/usr/local/lib/python2.7/site-packages/jinja2/environment.py", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/lib/python2.7/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "base_test.html", line 5, in top-level template code
  File "head.html", line 13, in top-level template code
  File "/usr/local/lib/python2.7/site-packages/jinja2/sandbox.py", line 385, in getattr
    value = getattr(obj, attribute)
UndefinedError: 'css' is undefined

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