Linux 4.8 software updates

[ArmandHC89]

I Cannot get software updated.

===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.freecinema2022.gq/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

Hit:1 http://repo.linuxliteos.com/linuxlite diamond InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit:3 http://linux.teamviewer.com/deb stable InRelease
Ign:4 http://linux.dropbox.com/ubuntu bionic InRelease
Get:5 http://linux.dropbox.com/ubuntu bionic Release [6 600 B]
Get:6 http://us.archive.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Ign:7 http://ppa.launchpad.net/hunter-kaller/ppa/ubuntu bionic InRelease
Hit:8 http://archive.canonical.com/ubuntu bionic InRelease
Get:9 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Hit:10 http://ppa.launchpad.net/iconnor/zoneminder-1.34/ubuntu bionic InRelease
Get:11 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:13 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease
Hit:14 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Err:15 http://ppa.launchpad.net/hunter-kaller/ppa/ubuntu bionic Release
  404  Not Found [IP: 91.189.95.83 80]
Reading package lists...
E: The repository 'http://ppa.launchpad.net/hunter-kaller/ppa/ubuntu bionic Release' does not have a Release file.