title: Heroku: ImportError: No module named site
body: <p>After some changes in my repo and deploy to heroku I am receiving the following error:</p>
  
  <p>ImportError: No module named site</p>
  
  <p>I not have idea what can cause the problem because I only change some Django templates in the last 2 commits.</p>
  
  <p>Best Regards</p>