# Pastebin 8DwhrsDU
sudo apt update && sudo apt -f install && sudo apt --simulate -Vy full-upgrade
Hit:1 http://nz.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://nz.archive.ubuntu.com/ubuntu focal-updates InRelease                                                                                                                       
Hit:3 http://nz.archive.ubuntu.com/ubuntu focal-backports InRelease                                                                                                                          
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease                                                                                                                             
Hit:5 https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/ InRelease                
Ign:6 http://ppa.launchpad.net/oguzhaninan/stacer/ubuntu focal InRelease
Ign:7 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64  InRelease
Hit:8 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64  Release
Err:10 http://ppa.launchpad.net/oguzhaninan/stacer/ubuntu focal Release
  404  Not Found [IP: 91.189.95.85 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/oguzhaninan/stacer/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.