Hi,

Please check your requirements.txt file and its version

then install your package from the settings 

Hope it helps

go and see requirement file they mentioned version of 

Werkzeug

so as per that version install it from terminal or got to settings > click on Project > Python Interpreter > click on + sign > search workzeug > iselect version in below > and install it 

pip3 install Werkzeug==version

Oddly enough the requirements.txt says this in the latest checkout of 14.0:

Werkzeug==0.16.1

So what breaks if you use this version? I mean we go back to 0.11... Why is Odoo going backwards? And why is the requirements.txt not up to date then?

EDIT: in my case I noticed after a while that I was running the system wide python3.8 binary and not the virtualenv python3.7 for which I had modified odoo-bin. After git stash pop to have the path set to my virtualenv python it worked again with 0.16.1.

Hope it helps someone else.