HTML : flask TypeError: 'ImmutableMultiDict' object is not callable

HTML : flask TypeError: 'ImmutableMultiDict' object is not callable
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I have a hidden feature that I promised to tell you about.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on the keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

A short overview of who I am,
Hello, I am Delphi.
I am happy to help you with your questions.
HTML : flask TypeError: 'ImmutableMultiDict' object is not callable
I am always open to chatting or receiving comments from you if you have more specific queries.
If you have an answer or any relevant information to share, please comment below.
Your answer will be appreciated and acknowledged with a 'heart' from me.
'ImmutableMultiDict' : TypeError: object callable is flask HTML not