package isc-dhcp-server 4.4.1-2.1ubuntu5.20.04.5 failed to install/upgrade: installed isc-dhcp-server package post-installation script subprocess returned error exit status 127

[Rolf Larsen]

Failed when upgrading from 18.04 to 20.04

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: isc-dhcp-server 4.4.1-2.1ubuntu5.20.04.5
ProcVersionSignature: Ubuntu 5.4.0-169.187~18.04.1-generic 5.4.257
Uname: Linux 5.4.0-169-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue Jan 9 10:47:15 2024
ErrorMessage: installed isc-dhcp-server package post-installation script subprocess returned error exit status 127
InstallationDate: Installed on 2022-05-12 (606 days ago)
InstallationMedia: Ubuntu-Server 18.04.6 LTS "Bionic Beaver" - Release amd64 (20210915)
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-5.4.0-169-generic root=UUID=905b71bd-9ca7-4f37-9b80-a766904e5fae ro usbcore.autosuspend=-1 ipv6.disable=1 usb-storage.quirks=174c:55aa:u ipv6.disable=1
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
SourcePackage: isc-dhcp
Title: package isc-dhcp-server 4.4.1-2.1ubuntu5.20.04.5 failed to install/upgrade: installed isc-dhcp-server package post-installation script subprocess returned error exit status 127
UpgradeStatus: Upgraded to focal on 2024-01-09 (0 days ago)
mtime.conffile..etc.dhcp.dhcpd.conf: 2023-02-26T22:46:30.427609