Error message does not state where it's from

# Preface:

I experienced this bug in update-notifier.
However, I think this might be a Gtk-wide problem.

# Description:

update-notifier has a problem and shows error message:
----------------------------------------
-- System program problem detected
-- Do you want to report the problem now?
--
-- Cancel Report problem...
----------------------------------------
(screenshot: https://imgur.com/a/HDRzQ08 )

This message does not state where it's from. The user does not know what is broken and what kind of help they should search for.

# Expected Behavior

The message should state that it's the update notifier which had a problem.

(Side note: It might probably also provide some optional details and explain what actually went wrong)

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: update-notifier 3.192.45.1
ProcVersionSignature: Ubuntu 5.13.0-28.31-generic 5.13.19
Uname: Linux 5.13.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Tue Feb 15 19:22:26 2022
InstallationDate: Installed on 2022-02-14 (1 days ago)
InstallationMedia: Xubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
SourcePackage: update-notifier
UpgradeStatus: No upgrade log present (probably fresh install)