title: django filer plugin for image - undefined thumbnails
body: <p>I'm really new to Django CMS.</p>
  
  <p>I created a virtual env, installed django cms, and I have two simple template with placeholders.</p>
  
  <p>I have installed django filer for file, image and folder. It s working but when I upload an image ..the image is actually uploaded I can see in media folder but on the django interface the thumbnails are undefined.</p>
  
  <p>I have installed <code>easy_thumbnails</code> but in the media folder I can't see the "filer_public_thumbnails" folder.</p>
  
  <p>This may be similar problem to this:
  <a href="https://stackoverflow.com/questions/9885312/undefined-uploads-using-django-cms-cmsplugin-filer-file-and-cmsplugin-filer-imag">undefined uploads using django cms cmsplugin_filer_file and cmsplugin_filer_image</a></p>
  
  <p>I understood the problem but I can't figure out how to solve i ...I have tried to create the directory manually but it doesn't work.</p>
  
  <p>If I inspect the 'undefined" thumbnails window I have two error in the console:</p>
  
  <pre><code>Failed to load resource: the server responded with a status of 500 (INTERNAL SERVER ERROR) 
  Failed to load resource: the server responded with a status of 404 (NOT FOUND) 
  </code></pre>
  
  <p>Any tips please?</p>