PYTHON : TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'

PYTHON : TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I'm going to share a hidden feature with you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Then, type the letters 'awesome' on the keyboard.
Your YouTube progress indicator will turn into a shimmering rainbow.

Here's a short introduction about myself,
Hey, I'm known as Delphi.
Allow me to support you in answering your questions.
PYTHON : TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'
If you need more specific information, let me know by leaving a comment or starting a chat.
Please feel free to share your answer or insights on the answer by leaving a comment below.
Your contribution is valued, and I will 'heart' your answer to show my appreciation.
unsupported 'str' TypeError: for 'NoneType' type(s) and %: operand : PYTHON