Error on getting Update List tualatrix ppa

[UserME]

[member=7573]UserME[/member]

Remove the offending PPA

Uncheck the PPA from "Software and Updates" under the "Other Software" tab..Then try running updates again..
You can update from terminal or from Menu > Favorites > Install Updates

I tried but get this...

sudo apt-get update
Ign:1 http://ppa.launchpad.net/tualatrix/ppa/ubuntu focal InRelease           
Hit:2 http://repo.linuxliteos.com/linuxlite emerald InRelease                 
Hit:3 http://archive.canonical.com/ubuntu focal InRelease                     
Hit:4 http://archive.ubuntu.com/ubuntu focal InRelease                       
Err:5 http://ppa.launchpad.net/tualatrix/ppa/ubuntu focal Release             
  404  Not Found [IP: 91.189.95.85 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/tualatrix/ppa/ubuntu focal 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.