t

Hit:1 http://archive.ubuntu.com/ubuntu cosmic InRelease
Hit:2 http://archive.canonical.com/ubuntu cosmic InRelease
Ign:3 http://ppa.launchpad.net/alexlarsson/flatpak/ubuntu cosmic InRelease
Hit:4 http://linux.teamviewer.com/deb stable InRelease
Hit:5 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease
Hit:6 http://linux.teamviewer.com/deb preview InRelease
Hit:7 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease
Hit:8 https://deb.opera.com/opera-stable stable InRelease
Hit:9 http://archive.ubuntu.com/ubuntu cosmic-security InRelease
Hit:10 http://ppa.launchpad.net/openrazer/stable/ubuntu cosmic InRelease
Ign:11 http://ppa.launchpad.net/screenlets/ppa/ubuntu cosmic InRelease
Err:12 http://ppa.launchpad.net/alexlarsson/flatpak/ubuntu cosmic Release
  404  Not Found [IP: 91.189.95.83 80]
Err:13 http://ppa.launchpad.net/screenlets/ppa/ubuntu cosmic Release
  404  Not Found [IP: 91.189.95.83 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/alexlarsson/flatpak/ubuntu cosmic 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.
E: The repository 'http://ppa.launchpad.net/screenlets/ppa/ubuntu cosmic 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.