PYTHON : Error when using pyinstaller: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff

PYTHON : Error when using pyinstaller: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff
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 your keyboard as the next step.
It will change your youtube progress bar into a flashing rainbow.

A brief presentation of myself,
Hello there, my name is Delphi.
I am capable of providing answers to your questions.
PYTHON : Error when using pyinstaller: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff
I am always open to chatting or receiving comments from you if you have more specific queries.
Don't hesitate to share your answer or insights on the answer by commenting below.
I will 'heart' your answer as a sign of appreciation.
using UnicodeDecodeError: PYTHON codec can't when 0xff byte Error 'utf-8' : decode pyinstaller: