Similar to this question I cannot seem to install anything through terminal as it spits back the error: E: The repository 'http://ppa.launchpad.net/webupd8team/brackets/ubuntu focal Release' does not have a Release file.
Looking at the other question, it suggests removing the ppa, which I tried:
sudo add-apt-repository --remove ppa:launchpad.net/webupd8team/brackets/ubuntu
Cannot add PPA: 'ppa:~launchpad.net/webupd8team/brackets/ubuntu'.
ERROR: '~launchpad.net' user or team does not exist.
Also, when I do try to install something, the original error is:
E: The repository 'http://ppa.launchpad.net/webupd8team/brackets/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.
Please note this issue was happening before I switched to kbuntu as well
If anyone has a solution for this, I'd greatly appreciate a helping hand, thanks!