update-manager crashed with dbus.exceptions.DBusException in call_blocking(): org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program org.debian.apt: Permission denied

[Gerrit Maes]

Update manager has been showing an update for Ubuntu Basis for a few weeks now. Selecting the update causes the application to crash with the fault code mentioned.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: update-manager 1:16.04.14
ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Aptdaemon:

Architecture: amd64
CurrentDesktop: Unity
Date: Wed Oct 24 18:05:24 2018
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'375'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'597'
 b'com.ubuntu.update-manager' b'launch-time' b'int64 1540397096'
InstallationDate: Installed on 2015-10-14 (1106 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
PythonArgs: ['/usr/bin/update-manager', '--no-update', '--no-focus-on-map']
SourcePackage: update-manager
Title: update-manager crashed with dbus.exceptions.DBusException in call_blocking(): org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program org.debian.apt: Permission denied
UpgradeStatus: Upgraded to xenial on 2016-04-30 (906 days ago)
UserGroups: adm audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev pulse pulse-access sambashare scanner sudo tape vboxusers video

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1063589, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.