WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number

[AlexandreBourrieau]

Description

My system:
ubuntu 20.04
Python 3.6.9
pip 21.3.1 from /home/decaix/.local/lib/python3.6/site-packages/pip (python 3.6)

I cannot get ride of the error message ... I've tried everything found on internet but nothing works...

Perhaps it's the proxy of my office wich is malformaed ?

I can do git clone, download with wget, access internet ... but cannot use pip3 install wth the package jupyter

I tried :
set http_proxy=http://ip:port
set htts_proxy=httpS://ip:port and http://ip:port
set HTTP_PROXY=http://ip:port
set HTTPS_PROXY=httpS://ip:port and http://ip:port

I tried :
sudo pip3 install jupyter --trusted-host pypi.org --trusted-host files.pythonhosted.org --proxy=http://ip:port
sudo pip3 install jupyter --trusted-host pypi.org --trusted-host files.pythonhosted.org --proxy=httpS://ip:port
sudo pip3 install jupyter --trusted-host pypi.org --trusted-host files.pythonhosted.org

...please can someone have a solution ?
Thanks

Expected behavior

No response

pip version

21.3.1

Python version

3.6.9

OS

ubuntu 20.04

How to Reproduce

sudo pip3 install jupyter --trusted-host pypi.org --trusted-host files.pythonhosted.org

Output

No response

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