AP
и посмотри сколько это стоит
Err:14 http://ppa.launchpad.net/shemgp/gnome-40/ubuntu focal Release
404 Not Found [IP: 91.189.95.85 80]
...
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/shemgp/gnome-40/ubuntu 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.
