title: Django 3.1 | Admin page appearance issue
body: <p>Today I have updated Django to latest version 3.1.</p>
  <p>But for some reason when the logged in to admin page, all I cans see is a weird looking admin page.</p>
  <p><a href="https://i.stack.imgur.com/l3v4Z.png" rel="noreferrer"><img src="https://i.stack.imgur.com/l3v4Z.png" alt="Django Admin screenshot" /></a></p>
  <p>admin.py</p>
  <p><a href="https://i.stack.imgur.com/LiVnZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/LiVnZ.png" alt="admin.py" /></a></p>
  <p>Can someone help me what went wrong or what are things I need to modify to get back to original admin page.</p>
  <p>Thanks in advance</p>