package initramfs-tools 0.130ubuntu3.1 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1

[Dragoneye]

Fresh install from live cd

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: initramfs-tools 0.130ubuntu3.1
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Thu Sep 13 10:09:02 2018
ErrorMessage: installed initramfs-tools package post-installation script subprocess returned error exit status 1
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.130ubuntu3.1 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Timo Aaltonen (tjaalton)]

Processing triggers for initramfs-tools (0.130ubuntu3.1) ...
update-initramfs: Generating /boot/initrd.img-4.15.0-29-generic
cryptsetup: WARNING: failed to detect canonical device of overlay
cryptsetup: WARNING: could not determine root device from /etc/fstab
I: The initramfs will attempt to resume from /dev/sda2
I: (UUID=41df2b38-d40b-4dcc-a7f8-378892ae25a3)
I: Set the RESUME variable to override this.
cp: cannot create regular file '/cdrom/casper/initrd.gz.new': No such file or directory
dpkg: error processing package initramfs-tools (--configure):
 installed initramfs-tools package post-installation script subprocess returned error exit status 1

that's a weird one..