dock_applet.py crashed with AttributeError in set_app_icon(): 'NoneType' object has no attribute 'scale_simple'

[Ínitu Castilhos da Rosa]

-

ProblemType: Crash
DistroRelease: Ubuntu 19.04
Package: mate-dock-applet 0.88-1
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu19
Architecture: amd64
CurrentDesktop: MATE
Date: Mon Feb 4 09:34:57 2019
ExecutablePath: /usr/lib/mate-applets/mate-dock-applet/dock_applet.py
InstallationDate: Installed on 2019-01-19 (16 days ago)
InstallationMedia: Ubuntu-MATE 19.04 "Disco Dingo" - Alpha amd64 (20190118)
InterpreterPath: /usr/bin/python3.7
ProcCmdline: python3 /usr/lib/mate-applets/mate-dock-applet/dock_applet.py
ProcEnviron:
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 LANG=pt_BR.UTF-8
Python3Details: /usr/bin/python3.7, Python 3.7.2, python3-minimal, 3.7.2-1
PythonArgs: ['/usr/lib/mate-applets/mate-dock-applet/dock_applet.py']
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15-4
SourcePackage: mate-dock-applet
Title: dock_applet.py crashed with AttributeError in set_app_icon(): 'NoneType' object has no attribute 'scale_simple'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo