Bakboxen Design Error: Unable to locate images/header-bild.png

Triggered by: page_template.html (line 9)

  7. <header>
  8.   <div class="header-image">
> 9.     <img src="{{ 'images/header-bild.png' | asset_url }}" alt="Titel på sidan">
  10.   </div>
  11. </header>

Stack Trace:

Traceback (most recent call last):
  File "/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 "page_template.html", line 2, in top-level template code
  File "base.html", line 175, in top-level template code
  File "page_template.html", line 9, in block "page_content"
  File "/src/cratejoy/cratejoy/util/timer.py", line 66, in decorated
    res = f(*args, **kwargs)
MissingAssetException: Syntax error 'Unable to locate images/header-bild.png' on line 9

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