package linux-image-5.8.0-34-generic 5.8.0-34.37~20.04.2 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1

[felix mason]

I have an encrypted filesystem. The system will no longer boot after this and no longer be able to access the encrypted file system. It will bricked at the next reboot.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-34-generic 5.8.0-34.37~20.04.2
ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
Uname: Linux 5.4.0-58-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Jan 7 10:48:04 2021
ErrorMessage: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
InstallationDate: Installed on 2020-12-23 (14 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.2
SourcePackage: initramfs-tools
Title: package linux-image-5.8.0-34-generic 5.8.0-34.37~20.04.2 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
UpgradeStatus: No upgrade log present (probably fresh install)

[felix mason (dogfoobar)]

Contents of cryptab

sda6_crypt UUID=09558fbd-f3e4-4b8f-be73-89821668383a none luks,keyscript=decrypt_keyctl,discard
sdb1_crypt UUID=1606b0ca-a544-43e9-ade7-8b33ac930d10 none luks,keyscript=decrypt_keyctl