package tomcat9 9.0.31-1 failed to install/upgrade: installed tomcat9 package post-installation script subprocess returned error exit status 1

[academyadmin]

Problem still persisting
Tomcat9 on 198.04 cannot be updated in the upgrade process to 20.4

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: tomcat9 9.0.31-1
ProcVersionSignature: Ubuntu 4.15.0-121.123-generic 4.15.18
Uname: Linux 4.15.0-121-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Oct 15 16:05:44 2020
DuplicateSignature:
 package:tomcat9:9.0.31-1
 Setting up grub-pc (2.04-1ubuntu26.4) ...
 dpkg: error processing package grub-pc (--configure):
  installed grub-pc package post-installation script subprocess returned error exit status 1
ErrorMessage: installed tomcat9 package post-installation script subprocess returned error exit status 1
PackageArchitecture: all
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 2.0.2ubuntu0.1
SourcePackage: tomcat9
Title: package tomcat9 9.0.31-1 failed to install/upgrade: installed tomcat9 package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to focal on 2020-10-15 (0 days ago)