update-manager crashed with Depends in _show_transaction(): python3 (< 3.7) but 3.6.5-2 is installed

[CHRIS SAYERS]

lenovo t61p

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: update-manager 1:18.04.11
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 15 19:29:25 2018
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'int64 1523816509'
InstallationDate: Installed on 2018-04-01 (14 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180327)
InterpreterPath: /usr/bin/python3.6
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-2
PythonArgs: ['/usr/bin/update-manager']
PythonDetails: /home/chris/Error: command ['which', 'python'] failed with exit code 1:, Error: [Errno 2] No such file or directory: "/home/chris/Error: command ['which', 'python'] failed with exit code 1:": "/home/chris/Error: command ['which', 'python'] failed with exit code 1:", unpackaged
SourcePackage: update-manager
Title: update-manager crashed with Depends in _show_transaction(): python3 (< 3.7) but 3.6.5-2 is installed
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[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 #1203597, 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.