Install gnupg-agent by entering the following commands in the terminal:
sudo apt update sudo apt install gnupg-agent
Description:
GNU privacy guard - cryptographic agent (dummy transitional package)
GnuPG is GNU's tool for secure communication and data storage. It can be used to encrypt data and to create digital signatures. It includes an advanced key management facility and is compliant with the proposed OpenPGP Internet standard as described in RFC4880. . This is a dummy transitional package; please use gpg-agent instead.
Homepage: https://www.gnupg.org/
Version: 2.2.4-1ubuntu1
Section: universe/utils