Fails to install - Focal

[yllekz]

Hello, I'm on Linux Mint 20.3 Cinnamon, which reports it is of the focal variety.

The installation instructions as detailed on the main page do not complete. The errors stem from the sudo apt update step. The following errors occur:

Reading package lists... Done
W: https://packages.microsoft.com/ubuntu/21.04/prod/dists/hirsute/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: https://packages.microsoft.com/repos/ms-teams/dists/stable/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://mirrors.mit.edu/ubuntu/dists/focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://ppa.launchpad.net/hluk/copyq/ubuntu/dists/focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://mirrors.mit.edu/ubuntu/dists/focal-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://mirrors.mit.edu/ubuntu/dists/focal-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://ppa.launchpad.net/lutris-team/lutris/ubuntu/dists/focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://mirrors.seas.harvard.edu/linuxmint-packages/dists/una/Release.gpg: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: https://repo.steampowered.com/steam/dists/stable/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://packages.microsoft.com/repos/code/dists/stable/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://archive.canonical.com/ubuntu/dists/focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: https://dl.winehq.org/wine-builds/ubuntu/dists/focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://download.opensuse.org/repositories/home:/bgstack15:/Chicago95/Debian_Testing/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
W: GPG error: http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 02456C79B2FD48BF
E: The repository 'http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal  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.
W: http://ppa.launchpad.net/obsproject/obs-studio/ubuntu/dists/focal/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.
/trusted.gpg.d/home-ungoogled_chromium.gpg are ignored as the file has an unsupported filetype.

I am positive I am using the correct install instructions but the errors make no sense to me. Can someone explain?

[gadall]

@yllekz APT is telling you that /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg does not contain the expected content. The file should be 747 bytes long, with binary content, and the md5 sum of 948ad7af64f148ff3e9bb6bfcb448b41. The command file /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg should yield OpenPGP Public Key Version 4, Created Fri Apr 24 06:23:19 2020 ...

[ghost]

New release in progress, this is no longer relevant.