[Bug 1788192] Re: package base-files 10.1ubuntu2.2 failed to install/upgrade: end of file on stdin at conffile prompt

[Val]

UPDATE to comment #3.
Executing plasma-discover from a terminal magically solved the issue!
I'll now attach a copy of what displayed in my terminal (see file "successful installation of pending updates thanks to a manual execution of plasma-discover.txt").

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https://bugs.launchpad.net/bugs/1788192

Title:
  package base-files 10.1ubuntu2.2 failed to install/upgrade: end of
  file on stdin at conffile prompt

Status in base-files package in Ubuntu:
  Incomplete

Bug description:
  I have been facing update problems every month.

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: base-files 10.1ubuntu2.2
  ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
  Uname: Linux 4.15.0-32-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  AptOrdering:
   base-files:amd64: Install
   base-files:amd64: Configure
   NULL: ConfigurePending
  Architecture: amd64
  Date: Tue Aug 21 10:15:39 2018
  Dependencies:
   
  ErrorMessage: end of file on stdin at conffile prompt
  InstallationDate: Installed on 2018-03-14 (159 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  Python3Details: /usr/bin/python3.6, Python 3.6.5, unpackaged
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, unpackaged
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.3
  SourcePackage: base-files
  Title: package base-files 10.1ubuntu2.2 failed to install/upgrade: end of file on stdin at conffile prompt
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.issue:
   Ubuntu 18.04 LTS \n \l
  modified.conffile..etc.issue.net: Ubuntu 18.04 LTS
  modified.conffile..etc.lsb-release:
   DISTRIB_ID=Ubuntu
   DISTRIB_RELEASE=18.04
   DISTRIB_CODENAME=bionic
   DISTRIB_DESCRIPTION="Ubuntu 18.04 LTS"
  mtime.conffile..etc.issue: 2018-04-24T05:34:22
  mtime.conffile..etc.issue.net: 2018-04-24T05:34:22
  mtime.conffile..etc.legal: 2015-10-22T15:15:21
  mtime.conffile..etc.lsb-release: 2018-04-24T05:33:11
  mtime.conffile..etc.update-motd.d.00-header: 2015-10-22T15:15:21
  mtime.conffile..etc.update-motd.d.10-help-text: 2016-06-14T09:23:23
  mtime.conffile..etc.update-motd.d.50-motd-news: 2017-06-29T12:35:01

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