GPG error: https://download.jitsi.org stable/ InRelease: The following signatures couldn’t be verified
Error:
# apt update
Hit:1 http://security.debian.org/debian-security buster/updates InRelease
Hit:2 http://deb.debian.org/debian buster InRelease
Get:3 https://download.jitsi.org stable/ InRelease [1,882 B]
Err:3 https://download.jitsi.org stable/ InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B4D2D216F1FD7806
Reading package lists... Done
Building dependency tree
Reading state information... Done
12 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://download.jitsi.org stable/ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B4D2D216F1FD7806
W: Failed to fetch https://download.jitsi.org/stable/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B4D2D216F1FD7806
W: Some index files failed to download. They have been ignored, or old ones used instead.
Quick fix:
# curl https://download.jitsi.org/jitsi-key.gpg.key | sh -c 'gpg --dearmor > /usr/share/keyrings/jitsi-keyring.gpg'
# apt-get update