Django : Django-oscar: Type Error following the tutorial

Django : Django-oscar: Type Error following the tutorial
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a secret feature that I want to reveal to you.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Then, type the letters 'awesome' on the keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

Here's a short introduction about myself,
Hello, I am Delphi.
I can provide you with assistance to help you answer your questions.
Django : Django-oscar: Type Error following the tutorial
If you need more specific information, let me know by leaving a comment or starting a chat.
If you have an answer or any relevant information to share, please comment below.
A 'heart' from me is a way of showing appreciation for your answer.
the Error Django-oscar: following Django : Type tutorial