grub fails when trying to install ubuntu 2020.04

[Erandi Vega]

I have been trying to fix grub, by various methods, I have used:
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install boot-repair
boot-repair

but in the terminal I get the following error

ubuntu@ubuntu:~$ sudo add-apt-repository ppa:yannubuntu/boot-repair
 Simple tool to repair frequent boot problems.

Website: https://sourceforge.net/p/boot-repair/home
 More info: https://launchpad.net/~yannubuntu/+archive/ubuntu/boot-repair
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Ign:1 cdrom://Ubuntu 20.04.6 LTS _Focal Fossa_ - Release amd64 (20230316) focal InRelease
Hit:2 cdrom://Ubuntu 20.04.6 LTS _Focal Fossa_ - Release amd64 (20230316) focal Release
Hit:4 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:6 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu focal InRelease
Reading package lists... Done
ubuntu@ubuntu:~$ sudo apt-get update
Ign:1 cdrom://Ubuntu 20.04.6 LTS _Focal Fossa_ - Release amd64 (20230316) focal InRelease
Hit:2 cdrom://Ubuntu 20.04.6 LTS _Focal Fossa_ - Release amd64 (20230316) focal Release
Hit:4 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:6 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu focal InRelease
Hit:7 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Reading package lists... Done
ubuntu@ubuntu:~$ sudo apt-get install boot-repair
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  boot-sav boot-sav-extra efibootmgr glade2script glade2script-python3
  pastebinit
Suggested packages:
  boot-info mdadm os-uninstaller gir1.2-appindicator3-0.1
The following NEW packages will be installed:
  boot-repair boot-sav boot-sav-extra efibootmgr glade2script
  glade2script-python3 pastebinit
0 upgraded, 7 newly installed, 0 to remove and 375 not upgraded.
Need to get 38.1 kB/770 kB of archives.
After this operation, 3,454 kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 cdrom://Ubuntu 20.04.6 LTS _Focal Fossa_ - Release amd64 (20230316) focal/main amd64 efibootmgr amd64 17-1 [28.1 kB]
Err:2 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu focal/main amd64 glade2script-python3 all 3.2.4~ppa23
  403 Forbidden [IP: 185.125.190.80 80]
Err:3 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu focal/main amd64 glade2script all 3.2.4~ppa23
  403 Forbidden [IP: 185.125.190.80 80]
E: Failed to fetch http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu/pool/main/g/glade2script/glade2script-python3_3.2.4~ppa23_all.deb 403 Forbidden [IP: 185.125.190.80 80]
E: Failed to fetch http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu/pool/main/g/glade2script/glade2script_3.2.4~ppa23_all.deb 403 Forbidden [IP: 185.125.190.80 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Also try this
sudo apt-get update
sudo apt-get upgrade --fix-missing
sudo apt-get install foo --fix-missing

but my problem is the same

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.19
ProcVersionSignature: Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85
Uname: Linux 5.15.0-67-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445.3
Date: Tue Apr 9 17:30:31 2024
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04.6 LTS "Focal Fossa" - Release amd64 (20230316)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Guiver (guiverc)]

Thank you for taking the time to report this issue and helping to make Ubuntu better.

Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker.

We understand the difficulties you are facing, but it is better to raise problems you are having in the support tracker at https://answers.launchpad.net/ubuntu if you are uncertain if they are bugs.

If you would prefer live chat support, you can find an IRC support channel for your flavor of Ubuntu here: https://wiki.ubuntu.com/IRC/ChannelList.

You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org. For help on reporting bugs, see https://help.ubuntu.com/community/ReportingBugs.

(FYI: PPAs are Personal Package Archives and not supported by the Ubuntu project, but by the PPA owner. Bugs/requests about PPAs should likewise be filed with the PPA owner).