Clean Ubuntu 24.02 install with system updates (trying to install Enhance):
Err:4 https://apt.enhance.com oracular Release
404 Not Found [IP: 2606:4700:20::681a:887 443]
Get:5 http://nova.clouds.archive.ubuntu.com/ubuntu oracular-updates InRelease [126 kB]
Get:6 http://nova.clouds.archive.ubuntu.com/ubuntu oracular-backports InRelease [126 kB]
Error: The repository 'https://apt.enhance.com oracular Release' does not have a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.
Disabling IP v6 still gives the same error:
Ign:5 https://apt.enhance.com oracular InRelease
Err:6 https://apt.enhance.com oracular Release
404 Not Found [IP: 172.67.72.51 443]
Error: The repository 'https://apt.enhance.com oracular Release' does not have a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.