Error: Command failed with exit code 1: sudo 'add-apt-repository' '-y' 'ppa:ubuntu-toolchain-r/test'

Failed to install the llvm-8

Failed to add apt key via server keyserver.ubuntu.com: Error: Command failed with exit code 2: sudo 'gpg' '--no-default-keyring' '--keyring' 'gnupg-ring:/etc/apt/trusted.gpg.d/launchpad-toolchain.gpg' '--keyserver' 'keyserver.ubuntu.com' '--recv-keys' '1E9377A2BA9EF27F'

Failed to add apt key via server keyserver.ubuntu.com: Error: Command failed with exit code 2: sudo 'gpg' '--no-default-keyring' '--keyring' 'gnupg-ring:/etc/apt/trusted.gpg.d/setup-cpp-ubuntu-archive.gpg' '--keyserver' 'keyserver.ubuntu.com' '--recv-keys' '3B4FE6ACC0B21F32'

Falling back to LLVM version 17.0.6 -ubuntu-22.04 for the Ubuntu.