The repository 'http://ppa.launchpad.net/kazam-team/stable-series/ubuntu bionic Release' does not have a Release file code example
Example: E: The repository 'http://ppa.launchpad.net/webupd8team/atom/ubuntu focal Release' does not have a Release file. 404 error remove
sudo add-apt-repository --remove ppa:mc3man/trusty-media