Update error

[CaperAsh]

As per instructions on the pop-up window, pasting in the log from an update error which has been ongoing now for many days.


  ============ Log ===========


Hit:1 https://repo.skype.com/deb stable InRelease
Ign:2 http://ppa.launchpad.net/bumblebee/stable/ubuntu bionic InRelease
Hit:3 http://archive.canonical.com bionic InRelease
Hit:4 http://archive.ubuntu.com/ubuntu bionic InRelease
Hit:5 http://repo.linuxliteos.com/linuxlite diamond InRelease
Get:6 http://archive.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:7 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu bionic InRelease
Hit:8 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease
Get:9 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Hit:10 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Err:11 http://ppa.launchpad.net/bumblebee/stable/ubuntu bionic Release
  404 Not Found [IP: 91.189.95.83 80]
Get:12 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Get:13 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [552 kB]
Get:14 http://archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages [472 kB]
Get:15 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [742 kB]
Get:16 http://archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages [732 kB]
Get:17 http://archive.ubuntu.com/ubuntu bionic-updates/universe Translation-en [193 kB]
Reading package lists...
E: The repository 'http://ppa.launchpad.net/bumblebee/stable/ubuntu bionic Release' does not have a Release file.