Truly Organic Design Error: Undefined is not JSON serializable

Triggered by: reviews.html (line 3)

  1. <!-- theme_id: 102903376, modified_at: 2016-01-15 15:56:03.303769 -->
> 3. {{ | tojson }}

Stack Trace:

Traceback (most recent call last):
  File "/usr/src/app/src/cratejoy/cratejoy/theme/", line 401, in render_page
    output = tpl.render(**kwargs)
  File "/usr/local/lib/python2.7/site-packages/jinja2/", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/lib/python2.7/site-packages/jinja2/", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "reviews.html", line 3, in top-level template code
  File "/usr/local/lib/python2.7/site-packages/flask/", line 269, in tojson_filter
    return Markup(htmlsafe_dumps(obj, **kwargs))
TypeError: Undefined is not JSON serializable

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