NOTE: I know this is a duplicate, but the guides I follow don't work nor make sense.
I've been having this problem for a while now.
Running sudo apt-get update && sudo apt-get dist-upgrade
leaves me with this:
Hit:1 https://dl.winehq.org/wine-builds/ubuntu disco InRelease
Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:3 http://archive.canonical.com/ubuntu disco InRelease
Hit:4 http://dl.google.com/linux/chrome/deb stable Release
Get:5 http://security.ubuntu.com/ubuntu disco-security InRelease [97.5 kB]
Hit:6 http://deb.playonlinux.com trusty InRelease
Hit:7 http://ae.archive.ubuntu.com/ubuntu disco InRelease
Ign:8 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu disco InRelease
Get:9 http://ae.archive.ubuntu.com/ubuntu disco-updates InRelease [97.5 kB]
Err:10 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu disco Release
404 Not Found [IP: 91.189.95.83 80]
Hit:12 http://ae.archive.ubuntu.com/ubuntu disco-backports InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/gezakovacs/ppa/ubuntu disco 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.
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/gezakovacs-ubuntu-ppa-disco.list:1 and /etc/apt/sources.list.d/gezakovacs-ubuntu-ppa-disco.list:2
Any help? I'm on Kubuntu 19.04.