systray.py crashed with SIGABRT in qt_message_fatal()

Either in Ubuntu Gnome or Gnome Flashback the saner error happens.
But not in LXDE that it appears on the tray.
It happens that a long time that I remember because even in the Unity days I prefer use Gnome Flashback (Fallback in the start).

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Uname: Linux 4.16.0-997-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 12 23:07:19 2018
Dependencies:
 gcc-8-base 8-20180218-1ubuntu1
 libc6 2.27-0ubuntu2
 libgcc1 1:8-20180218-1ubuntu1
 liblzma5 5.2.2-1.3
 xz-utils 5.2.2-1.3
ExecutablePath: /usr/share/hplip/systray.py
InterpreterPath: /usr/bin/python2.7
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=err', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
Lpstat: device for Deskjet-F4100-series: hp:/usb/Deskjet_F4100_series?serial=BR85LG1F4F04TJ
MachineType: Acer V5-171
PackageArchitecture: all
Papersize: a4
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Deskjet-F4100-series.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Deskjet-F4100-series.ppd: Permission denied
ProcCmdline: python /usr/bin/hp-systray -x
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.16.0-997-generic root=UUID=65779dc8-aafc-45ab-bbc0-76120e38e060 ro quiet splash vt.handoff=1
Python3Details: /usr/bin/python3.6, Python 3.6.4+, python3-minimal, 3.6.4-1
PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
Signal: 6
SourcePackage: hplip
StacktraceTop:
 QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 QGuiApplicationPrivate::createPlatformIntegration() () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
 QGuiApplicationPrivate::createEventDispatcher() () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
 QCoreApplicationPrivate::init() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
 QGuiApplicationPrivate::init() () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
Title: systray.py crashed with SIGABRT in QMessageLogger::fatal()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin netdev plugdev sambashare sudo
dmi.bios.date: 11/26/2013
dmi.bios.vendor: Acer
dmi.bios.version: V2.21
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Mimic
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.21
dmi.modalias: dmi:bvnAcer:bvrV2.21:bd11/26/2013:svnAcer:pnV5-171:pvrV2.21:rvnAcer:rnMimic:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.21:
dmi.product.family: Type1Family
dmi.product.name: V5-171
dmi.product.version: V2.21
dmi.sys.vendor: Acer