apt update warnings

[AposChatz382]

Hello everyone,
I recently did an "apt update" from terminal and afterwards i started receiving these warnings:

W: Skipping acquire of configured file 'contrib/binary-amd64/Packages' as repository 'http://security.ubuntu.com/ubuntu focal-security InRelease' doesn't have the component 'contrib' (component misspelt in sources.list?)
W: Skipping acquire of configured file 'non-free/binary-amd64/Packages' as repository 'http://security.ubuntu.com/ubuntu focal-security InRelease' doesn't have the component 'non-free' (component misspelt in sources.list?)
full log
sources.list

I don't really understand what the issue is and how to get rid of these warning.
Thank you in advance!

EDIT:
To be more specific:
I was trying to install libncurses-dev but for some reason it was not available so i did the following steps:

• Enabled sources on software-properties-gtk
  
• Changed mirror location
  
• Updated from terminal
  

[trinidad]

Ubuntu source list components are: restricted, universe, multiverse.
Debian source list components are: contrib, non-free

You canNOT mix the two.

To use restricted, multiverse universe you must direct to an Ubuntu repository URL.
To use contrib and/or non-free you must direct to a Debian repository URL.

Linux Lite comes with the Gdebi installer. You should have used it.
Ubuntu focal Debian parent is Buster or oldstable.Ubuntu jammy Debian parent is Bullseye or stable.https://packages.debian.org/buster/libncurses-dev

TC 

[AposChatz382]

Yes that was the problem, thank you!  8)