Wet Shave Club Design Error: integer division or modulo by zero

Triggered by: subscribe2.html (line 139)

  137. 					{% else %}
  138. 						{% set ns = steps | length %}
> 139. 						{% set offset = (12 % ns) // 2 %}
  140. 						{% set col = 12 // ns %}
  141. 						{% for key, val in steps %}

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 "subscribe2.html", line 113, in top-level template code
  File "base.html", line 106, in top-level template code
  File "subscribe2.html", line 139, in block "page_content"
ZeroDivisionError: integer division or modulo by zero

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