package mime-support 3.60ubuntu1 failed to install/upgrade: installed mime-support package post-installation script subprocess returned error exit status 1

[Ian Penman]

No other information available. This seems to be an automatic upgrade.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: mime-support 3.60ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
Date: Sun May 13 21:38:25 2018
DuplicateSignature:
 package:mime-support:3.60ubuntu1
 Processing triggers for mime-support (3.60ubuntu1) ...
 Error: could not write '/etc/mailcap.new' -- Read-only file system
 dpkg: error processing package mime-support (--configure):
  installed mime-support package post-installation script subprocess returned error exit status 1
ErrorMessage: installed mime-support package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-05-12 (3 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /root/Error: command ['which', 'python'] failed with exit code 1:, Error: [Errno 2] No such file or directory: "/root/Error: command ['which', 'python'] failed with exit code 1:": "/root/Error: command ['which', 'python'] failed with exit code 1:", unpackaged
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: mime-support
Title: package mime-support 3.60ubuntu1 failed to install/upgrade: installed mime-support package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)