Dear ZEN users,
I am trying to setup a Horizen Super node.
I am stuck at step 3.8.
When I run:
sudo add-apt-repository ppa:certbot/certbot -y
GPG error: https://zencashofficial.github.io/repo bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FB7053CE4991B669
Suggesting the repository is not signed. I can probably find a way to ignore it but that would be rather unsafe. I mean that is the point of having the package signed right, other wise the code might have been messed with?
Any suggestions on how to continue?