I am runnig  Odoo 14 on Ubuntu Server, it is throwing the mentioned error in the backend server logs. Some sites suggested to install the missing packages/library html2text.

I have installed that too by running 

pip3 install html2text

and verified it by 

pip3 show html2text

which shows location of site-packages of python Location: 

/home/dell/.local/lib/python3.8/site-packages.

However, the system is still throwing this mentioned error in the logs 

ModuleNotFoundError: No module named 'html2text' - - -.