During the installation of the latest release of omv-extras (5.4.2 on OMV 5.5.15.1) I get the following error:
W: GPG error: https://dl.bintray.com/openmediavault-plugin-developers/usul buster Release: The following signatures were not verified because the public key is not available: NO_PUBKEY 7AA630A1EDEE7D73
E: The "https://dl.bintray.com/openmediavault-plugin-developers/usul buster Release" repository is not signed.
N: Updating from that repository cannot be performed securely and is therefore disabled by default.
N: See the apt-secure (8) man page for creating a repository and user configuration.
W: GPG error: https://dl.bintray.com/openmed…in-developers/usul-extras buster Release: The following signatures were not verified because the public key is not available: NO_PUBKEY 7AA630A1EDEE7D73
E: The "https://dl.bintray.com/openmediavault-plugin-developers/usul-extras buster Release" repository is not signed.
N: Updating from that repository cannot be performed securely and is therefore disabled by default.
N: See the apt-secure (8) man page for creating a repository and user configuration.
Someone can help me?