title: Django admin add related object doesn't open popup window?
body: <p>The django-admin app is supposed to open a popup window when I try to create a related object. For example, clicking the green plus button here:</p>
  
  <p><a href="https://i.stack.imgur.com/kT9Im.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kT9Im.png" alt="enter image description here"></a></p>
  
  <p>Should bring a new pop-up window, where I can create a new related (in this case Session) object. However, when I click the green plus button, the object create opens up in the same window, instead of a pop-up window. This is a problem, because if a user starts to create a primary object, then half-way through, clicks the green plus, he will lose all the progress on the primary object. This means that the green plus is unusable.</p>
  
  <p>I have no idea why this is happening. I understand that I am not providing a minimum example of the problem, because I haven't been able to construct one. Right now I want to <strong>diagnose</strong> the problem. Any ideas of how I can diagnose this? And fix it?</p>
  
  <p>I can provide any information you think is necessary.</p>
  
  <p>Related: <a href="https://stackoverflow.com/q/29811544/855050">Django admin popup links are broken</a>. But he's using Grappelli, which I am not. I am using the default django admin interface.</p>
  
  <p>I am using Django version 1.8.4.</p>
  
  <p><strong>UPDATE:</strong> The popups work fine with <code>manage.py runserver</code>. The problem only appears with the deployed version under apache. I hope this narrows down the issue.</p>
  
  <p>On google groups: <a href="https://groups.google.com/forum/#!topic/django-users/awYelJjFjHk" rel="nofollow noreferrer">https://groups.google.com/forum/#!topic/django-users/awYelJjFjHk</a>.</p>