grub won't install after ubuntu 18.04 installation

[Gunnar Hjern]

Now I very meticulously cleaned the hard drive with gparted, created a GPT partition table, created a FAT32 partition of 500MB and set both ESP and BOOT flags, and then created the rest of the partitions I wanted, including a SWAP.
I then chose "Do something else" and there the ESP partition was clearly visible and would be used. After I declared all the other partitions, the installations process __AGAIN__ gave me the old stubborn error "the grub-efi-amd64 package failed to install into /target/".

The computer I'm trying to install is a HP elite 8200 with and I5-2500 and a 500Gb hd.
I couldn't find anything in the BIOS settings that would indicate that is was set to legacy mode BIOS so I presume that it is running in UEFI mode.
If you need further information, don't hesitate to mail me about it.

A final note:
After using Linux for many years now, I really got to love and respect it very much, and I don't even want to think of what life would be without it!!!
I hope that you on Canonical also love and respect this wonderful gift that Linus Torwalds left us with - to make us free and powerful computer users. I really hope that you would __FIX__ this error once and for all (as it really did work in the previous versions) and release it as a new 18.04 LTS version.

Kindest regards
Gunnar

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.12
ProcVersionSignature: Ubuntu 4.18.0-15.16~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CasperVersion: 1.394
Date: Mon Jul 15 00:11:57 2019
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper quiet splash ---
LiveMediaBuild: Xubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Gunnar Hjern (gunnarhjern)]

Seems the file screendump I tried to attach didn't make it through, so trying again.
These screendumps shows both the gparted when the EFI partition was created, and the installer partition tables when trying to install.

[Gunnar Hjern (gunnarhjern)]

see above.