module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK' error after installing pdfminer

Question

When installing Odoo 16, I saw the following message in the log file:

WARNING shipping_pg odoo.addons.attachment_indexation.models.ir_attachment: Attachment indexation of PDF documents is unavailable because the 'pdfminer' Python library cannot be found on the system. You may install it from https://pypi.org/project/pdfminer.six/ (e.g. `pip3 install pdfminer.six`)

I then installed pdfminer via pip3 and immediately saw the following error:

File "/usr/local/lib/python3.10/dist-packages/Open

Nam Nguyen Phuong · Accepted Answer

Hi all, I found solution for the above error in Odoo16
When running  ' pip3 install pdfminer.six', it auto update new version for library 'cryptography'
Solution:
- Update version appropriate 'cryptography'
- ​In Odoo16,  *pip3 install cryptography==3.4.8*  (version in file requerements.txt)

Ray Carnes (ray) · Answer

I was able to resolve this by upgrading pyOpenSSL:
pip3 install pyOpenSSL --upgrade
In my case on Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-50-generic x86_64) this upgraded the library from version 19.0.0 to 22.1.0.
You then reinstall pdfminer as instructed.

Jean Nguyen · Answer

I had the same problem and I found a way to solve this problem that we should use the pdfminer.six version 20211012. The cryptography and pyOpenSSL we use as mentioned in odoo's "requirement.txt" file

pip install pdfminer.six==20211012

pip install pdfminer.six==20211012

Eric CATTELIN · Answer

Hello,
I've same error.
I've uninstall odoo python3-openssl and python3-crytography.
Then can install or uninstall pdfminer.sir or pyOpenssl or crypto.
When i reinstall odoo, even if i've install pip package, python3-openssl and python3-cryptography are reinstalled.
And pdfminer.six is not detected by odoo on start.
I don't understand.
Python 3.9.1
python3-openssl 20.0.0 python3-cryptography 3.0.0
pyopenssl 23.0.0 or 22.0.1, cryptography 38 or 39 tested.
I'm desappointed.
I can''t launch migrati

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