If your autoscaled images are not loading on Drupal then here are some steps to take to troubleshoot the problem. Firstly, if you have logging enabled then visit http://yoursite.com/admin/reports/dblog to see a list of the events. If you see events with the message "Unable to generate the derived image located at...." then check the permissions on your files directory. This is usually /sites/default/files. Then check that the GD library is installed for PHP. On Ubuntu you can install it with apt-get install php5-gd If you don't see any events then try opening the image url in a new tab on your browser to confirm that your web server is properly rewriting the request to index.php instead of trying to serve a file out of the directory. On Nginx you should consider using location blocks like this: # These next locations help with thumbnails - https://www.drupal.org/node/2374961 location @rewrite { rewrite ^/(.*)$ /index.php?q=$1 last; } ...