package python2.7-minimal:i386 2.7.12-1ubuntu0~16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

tutto è iniziato tentando di installare Phasis

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python2.7-minimal:i386 2.7.12-1ubuntu0~16.04.2
ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
Uname: Linux 4.4.0-104-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
Date: Wed Dec 27 02:17:31 2017
DpkgHistoryLog:
 Start-Date: 2017-12-27 02:17:30
 Requested-By: marco (1000)
 Install: python2.7-minimal:i386 (2.7.12-1ubuntu0~16.04.2, automatic), python-minimal:i386 (2.7.11-1, automatic)
 Remove: python2.7-minimal:amd64 (2.7.12-1ubuntu0~16.04.2)
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-12-09 (18 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: i386
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.24
SourcePackage: python2.7
Title: package python2.7-minimal:i386 2.7.12-1ubuntu0~16.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)