toolbox.py crashed with AttributeError in initUI(): 'DevMgr5' object has no attribute 'DiagnoseQueueAction'

[felix]

HPLIP Toolbox can not be opened.

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: hplip-data 3.18.7+dfsg1-2
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
CrashCounter: 1
CupsErrorLog:
 E [30/Sep/2018:11:55:56 +1000] [cups-deviced] PID 13105 (gutenprint53+usb) stopped with status 1!
 E [30/Sep/2018:12:09:30 +1000] [cups-deviced] PID 2044 (gutenprint53+usb) stopped with status 1!
 E [30/Sep/2018:13:25:33 +1000] [cups-deviced] PID 2034 (gutenprint53+usb) stopped with status 1!
 W [30/Sep/2018:13:40:36 +1000] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id \'Deskjet-2510-series-Gray..\' already exists
 W [30/Sep/2018:13:40:36 +1000] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id \'Deskjet-2510-series-RGB..\' already exists
CurrentDesktop: MATE
Date: Mon Oct 1 14:44:08 2018
ExecutablePath: /usr/share/hplip/toolbox.py
InstallationDate: Installed on 2018-09-30 (1 days ago)
InstallationMedia: Ubuntu-MATE 18.10 "Cosmic Cuttlefish" - Beta amd64 (20180927)
InterpreterPath: /usr/bin/python3.6
Lpstat: device for Deskjet-2510-series: hp:/usb/Deskjet_2510_series?serial=CN34F3JNCZ05QX
MachineType: Gigabyte Technology Co., Ltd. GA-78LMT-USB3
PackageArchitecture: all
Papersize: a4
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Deskjet-2510-series.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Deskjet-2510-series.ppd: Permission denied
ProcCmdline: /usr/bin/python3 /usr/bin/hp-toolbox
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-7-generic root=UUID=583b8a92-23ba-4bdf-b640-83051bc0abfe ro quiet splash vt.handoff=1
Python3Details: /usr/bin/python3.6, Python 3.6.6+, python3-minimal, 3.6.6-1
PythonArgs: ['/usr/bin/hp-toolbox']
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15-3
SourcePackage: hplip
Title: toolbox.py crashed with AttributeError in initUI(): 'DevMgr5' object has no attribute 'DiagnoseQueueAction'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 04/23/2013
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: FA
dmi.board.name: GA-78LMT-USB3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFA:bd04/23/2013:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-78LMT-USB3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[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 #1789184, 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.