Err:9 https://repo.download.nvidia.com/dgx/repos/focal focal Release
404 Not Found [IP: 23.48.203.203 443]
Hit:11 OpenFOAM - Browse /repos/deb at SourceForge.net focal InRelease
Reading package lists… Done
E: The repository ‘http://international.download.nvidia.com/dgx/repos/focal focal Release’ does not have a Release file.
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.