Install Updates Error Log

[lc6529]

Obviously I need to remove a repository (http://ppa.launchpad.net/webupd8team/ind...ect/ubuntu)

I tried deleting the files from /etc/apt/sources.list.d/webupd8team-ubuntu-indicator-kdeconnect-focal.list  but couldn't do so through GUI

Can anyone help please?

===========================
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://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu focal InRelease
Get:3 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease [107 kB]
Hit:4 https://packages.bluemail.me/repos/debian ./ InRelease
Hit:5 http://archive.canonical.com/ubuntu focal InRelease
Ign:6 http://ppa.launchpad.net/webupd8team/ind...ect/ubuntu focal InRelease
Get:7 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]
Get:8 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB]
Get:9 http://us.archive.ubuntu.com/ubuntu focal-updates/main Translation-en [93.2 kB]
Err:10 http://ppa.launchpad.net/webupd8team/ind...ect/ubuntu focal Release
  404  Not Found [IP: 91.189.95.83 80]
Get:11 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 c-n-f Metadata [6,960 B]
Hit:12 http://repo.linuxliteos.com/linuxlite emerald InRelease
Reading package lists...
E: The repository 'http://ppa.launchpad.net/webupd8team/indicator-kdeconnect/ubuntu focal Release' does not have a Release file.