Hello GUI/CLI gives error message:
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0E98404D386FA1D9 NO_PUBKEY 6ED0E7B82643E131
Get:12 http://packages.openmediavault.org/public shaitan/main armhf Packages [13.6 kB]
Get:13 https://openmediavault.github.io/packages shaitan/main armhf Packages [13.6 kB]
Reading package lists... Done
W: GPG error: http://httpredir.debian.org/debian bullseye-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0E98404D386FA1D9 NO_PUBKEY 6ED0E7B82643E131
E: The repository 'http://httpredir.debian.org/debian bullseye-backports InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
can you he;lp?