mate-optimus-applet Namespace AppIndicator3 not available

[Stuardo -StR- Rodríguez]

I tried to run the applet but I get the following error message:

$ /usr/bin/mate-optimus-applet
Traceback (most recent call last):
  File "/usr/bin/mate-optimus-applet", line 20, in <module>
    gi.require_version('AppIndicator3', '0.1')
  File "/usr/lib/python3/dist-packages/gi/__init__.py", line 129, in require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace AppIndicator3 not available

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: mate-optimus 19.10.4-0ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-26.28-generic 5.3.13
Uname: Linux 5.3.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu8.3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 6 06:44:22 2020
InstallationDate: Installed on 2019-12-13 (54 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
PackageArchitecture: all
SourcePackage: mate-optimus
UpgradeStatus: No upgrade log present (probably fresh install)

[Stuardo -StR- Rodríguez (stuardo)]

Tested solution in #55231452 to install package `gir1.2-appindicator3-0.1` and it worked.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package mate-optimus - 20.10.0-1

---------------
mate-optimus (20.10.0-1) unstable; urgency=medium

  [ Martin Wimpress ]
  * New upstream release.

  [ Mike Gabriel ]
  * debian/control: White-space fix.

 -- Mike Gabriel <email address hidden> Tue, 25 Aug 2020 09:50:05 +0200