package xrdp 0.9.12-1 failed to install/upgrade: installed xrdp package post-installation script subprocess returned error exit status 1

[Jason Duerstock]

Upgrade from 18.04 to 20.04 failed on Hyper-V VM

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: xrdp 0.9.12-1
ProcVersionSignature: Ubuntu 4.15.0-91.92-generic 4.15.18
Uname: Linux 4.15.0-91-generic x86_64
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
Date: Mon Mar 16 15:10:59 2020
DuplicateSignature:
 package:xrdp:0.9.12-1
 Installing new version of config file /etc/xrdp/xrdp_keyboard.ini ...
 ln: failed to create symbolic link '/etc/xrdp/cert.pem': File exists
 dpkg: error processing package xrdp (--configure):
  installed xrdp package post-installation script subprocess returned error exit status 1
ErrorMessage: installed xrdp package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu2
 apt 1.9.10
SourcePackage: xrdp
Title: package xrdp 0.9.12-1 failed to install/upgrade: installed xrdp package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to focal on 2020-03-16 (0 days ago)
mtime.conffile..etc.xrdp.sesman.ini: 2019-04-07T00:20:37.926477
mtime.conffile..etc.xrdp.xrdp.ini: 2019-04-07T00:20:37.918476

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Lenin (gagarin)]

Mind trying with Ubuntu 22.04 or 24.04?