No way to tell, for a broken indicator, which one it is

[Stuart Langridge]

My indicator panel, top right in Ubuntu MATE 18.04 (with the Mutiny layout), seems to contain an indicator with a "broken image" icon (red 🚫 symbol), which drops down a menu with no items in it. There seems to be no way to know which indicator this is in order to go about fixing or removing it.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: mate-indicator-applet 1.20.0-1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: MATE
Date: Sat Apr 28 17:37:13 2018
InstallationDate: Installed on 2014-04-07 (1482 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: mate-indicator-applet
UpgradeStatus: Upgraded to bionic on 2018-04-28 (0 days ago)

[Launchpad Janitor (janitor)]

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

[Martin Wimpress  (flexiondotorg)]

Sorry, mate-indicator-applet 1.20.0-1 is no longer supported.