something crashed the ubuntu installer, an error with grub, i believe is what it said. has happened twice.

[A.J.]

intel core i5 dual boot on partitioned HDD with Windows 10 already installed on the other side. Mounted most recent from UbuntuStudio to Samsung 128gb USB stick and loaded from Bios. everything fine until an error with "grub" i've gotten it twice, but had such a terrible time making this account to report the bug, that i forgot the exact error line.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-lowlatency 4.15.17
Uname: Linux 4.15.0-20-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
Date: Thu Jun 21 21:42:19 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntustudio.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu-Studio 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Your EFI system partition appears to not have the "EFI" directory on it. Can you open it and check?

[Launchpad Janitor (janitor)]

[Expired for grub-installer (Ubuntu) because there has been no activity for 60 days.]