package cryptsetup 2:1.6.6-5ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Tom Mulcahy]

using All In One - System Rescue Toolkit. This is based on Ubuntu 16.04.7 LTS. I performed a system update, which clude a large number of updates. This error appeared at the completion of the update process.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: cryptsetup 2:1.6.6-5ubuntu2.1
ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.30
Architecture: amd64
CasperVersion: 1.376.2
Date: Mon May 10 14:29:10 2021
ErrorMessage: subprocess installed post-installation script returned error exit status 1
LiveMediaBuild: Lubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.7
 apt 1.2.35
SourcePackage: cryptsetup
Title: package cryptsetup 2:1.6.6-5ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
crypttab: # <target name> <source device> <key file> <options>
fstab:
 aufs / aufs rw 0 0
 tmpfs /tmp tmpfs nosuid,nodev 0 0

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1724352, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.