ykman installation

I tried installing ykman in ubuntu-18.04(WSL) using below commands,

sudo apt-add-repository ppa:yubico/stable
sudo apt update
sudo apt install yubikey-manager

when I try to find the version using: ykman --version. I'm getting an error like,

Traceback (most recent call last): File "/usr/bin/ykman", line 6, in <module> from pkg_resources import load_entry_point
ModuleNotFoundError: No module named 'pkg_resources'

Please anyone help with this

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