Install libnsspem by entering the following commands in the terminal:
sudo apt update sudo apt install libnsspem
Description:
PEM file reader for Network Security Services (NSS)
This package provides a PEM file reader for Network Security Services (NSS), implemented as a PKCS#11 module.
Homepage: https://github.com/kdudka/nss-pem
Version: 1.0.3-0ubuntu2
Section: universe/libs