package friendly-recovery 0.2.36ubuntu1 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 2

[Yuri]

I was updating the new operating system

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: friendly-recovery 0.2.36ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4
Uname: Linux 4.13.0-16-lowlatency x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
Date: Sun Mar 18 14:49:36 2018
ErrorMessage: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 2
InstallationDate: Installed on 2018-03-18 (0 days ago)
InstallationMedia: Ubuntu-Studio 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5.1
SourcePackage: friendly-recovery
Title: package friendly-recovery 0.2.36ubuntu1 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 2
UpgradeStatus: No upgrade log present (probably fresh install)

[Juhani Numminen (jsonic)]

The file /etc/default/grub has incorrect syntax, there is a double quote character missing at the end of the GRUB_CMDLINE_LINUX line.