How to fix:AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'

Question

How to solve this error :
AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'
I have installed odoo 15 in my computer, then I tried to install odoo 16 by using the following script :
sudo wget https://raw.githubusercontent.com/Yenthe666/InstallScript/16.0/odoo_install.sh [1]
it didn't install properly, so I have deleted the odoo folder .

[1] https://raw.githubusercontent.com/Yenthe666/InstallScript/16.0/odoo_install.sh

Nilmar Shereef · Accepted Answer

Sometimes, if you are trying to install ENTERPRISE version through script, This error will occure.
You can solve this by following commands.
sudo pip uninstall pyopenssl
sudo pip install pyopenssl==22.0.0
sudo pip uninstall cryptography
sudo pip install cryptography==37.0.0
sudo shutdown -r now

Cybrosys Techno Solutions Pvt.Ltd · Answer

Hi,
This error is ocurring due to pyopenssl version not matching. You should check if the required version of pyopenssl is installed, if not uninstall and reinstall it. Also check for the correct version of werkzeug.
Regards

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