Install dirmngr by entering the following commands in the terminal:
sudo apt update sudo apt install dirmngr
Description:
GNU privacy guard - network certificate management service
dirmngr is a server for managing and downloading OpenPGP and X.509 certificates, as well as updates and status signals related to those certificates. For OpenPGP, this means pulling from the public HKP/HKPS keyservers, or from LDAP servers. For X.509 this includes Certificate Revocation Lists (CRLs) and Online Certificate Status Protocol updates (OCSP). It is capable of using tor for network access. . dirmngr is used for network access by gpg, gpgsm, and dirmngr-client, among other tools. Unless this package is installed, the parts of the GnuPG suite that try to interact with the network will fail.
Homepage: https://www.gnupg.org/
Version: 2.2.4-1ubuntu1
Section: utils