E: The repository 'http://ppa.launchpad.net/webupd8team/atom/ubuntu focal Release' does not have a Release file. 404 error remove

The error message "The repository 'http://ppa.launchpad.net/webupd8team/atom/ubuntu focal Release' does not have a Release file" indicates that the specified repository does not have a Release file, resulting in a 404 error. To resolve this issue, you can remove the repository from your system.