Ubuntu Studio installation crashes, grub failed to install

[ParanormalBanana]

Everything explained in title. I do not know more.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.8.6
ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-lowlatency 3.16.7-ckt3
Uname: Linux 3.16.0-30-lowlatency x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CasperVersion: 1.340
Date: Mon Mar 23 11:56:01 2015
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntustudio.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu-Studio 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: Traceback (most recent call last):
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: install.run()
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: func(self)
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 241, in run
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: self.configure_bootloader()
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1026, in configure_bootloader
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: "GrubInstaller failed with code %d" % ret)
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: ubiquity.install_misc.InstallStepError: GrubInstaller failed with code 1
Mar 23 10:55:06 ubuntu-studio /plugininstall.py: