Dr. Squatch Soap Co. Design Error: 'css' is undefined

Triggered by: base_old.html (line 22)

  20.     	<link rel="stylesheet" type="text/css" href="{{ 'css/subscription-v2.min.css' | asset_url }}">
  21.     	<link href="//cdn.rawgit.com/noelboss/featherlight/1.4.0/release/featherlight.min.css" type="text/css" rel="stylesheet" />
> 22.          {{ css.base() }}
  23. {{ 'css/product-reviews.css' | asset_url | stylesheet_tag }}
  24.          <!--link rel="stylesheet/less" type="text/css" href="less/main.less">

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_old.html", line 22, 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

PSST: If you are the owner of this store, fix this error from the code editor. See the developer documentation for more information.