Error about parser library and tree builder

[snippsat]

But lxml is already there. I can show your the output of conda list.

If use miniconda most active base environment.
Example.

G:\miniconda3
λ cd Scripts\

G:\miniconda3\Scripts
λ activate.bat

# See base()
(base) G:\miniconda3\Scripts
λ cd ..

(base) G:\miniconda3
λ pip show lxml
Name: lxml
Version: 4.6.3
Summary: Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.
Home-page: https://lxml.de/
Author: lxml dev team
Author-email: [email protected]
License: BSD
Location: g:\miniconda3\lib\site-packages
Requires:
Required-by:

(base) G:\miniconda3

As you see location is miniconda,if not base is active will use OS Python.
I have lxml in both so for it dos not matter.

C:\Users\Tom
λ pip show lxml
Name: lxml
Version: 4.6.2
Summary: Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.
Home-page: https://lxml.de/
Author: lxml dev team
Author-email: [email protected]
License: BSD
Location: c:\python39\lib\site-packages
Requires:
Required-by: yfinance, Scrapy, python-docx, parsel

Running code with miniconda.

G:\
λ cd miniconda3\Scripts\

G:\miniconda3\Scripts
λ activate.bat

(base) G:\miniconda3\Scripts
λ cd ..

(base) G:\miniconda3
λ python cnn.py
CNN International - Breaking News, US News, World News and Video

I use cmder here commands are same if use cmd/powershell.