package roundcube-core 1.4.3+dfsg.1-1 failed to install/upgrade: installed roundcube-core package post-installation script subprocess returned error exit status 10

[Daniel Eiteneuer]

During Ubuntu upgrade from 18.04 to 20.04 I was asked how to configure the roundcube database (mysql/sql lite). I canceled the assistant, since the mysql database has already been configured and running. Some seconds later during the update the error occured.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: roundcube-core 1.4.3+dfsg.1-1
ProcVersionSignature: Ubuntu 4.15.0-123.126-generic 4.15.18
Uname: Linux 4.15.0-123-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.11
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Nov 11 20:17:34 2020
ErrorMessage: installed roundcube-core package post-installation script subprocess returned error exit status 10
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: roundcube
Title: package roundcube-core 1.4.3+dfsg.1-1 failed to install/upgrade: installed roundcube-core package post-installation script subprocess returned error exit status 10
UpgradeStatus: Upgraded to focal on 2020-11-11 (0 days ago)