[Xfce-i18n] error message of unknown origin not understood

[Igor Zakharov]

16.09.2019, 14:15, "Benno Schulenberg" <bensberg at telfort.nl>:
> Hello,
>
> On an Xfce install (localized to Dutch), my sister sees the following
> message after an automatic login to the desktop:
>
>   systeemprogrammeerprobleem ontdekt
>
> I have no idea what this means, nor which part of Xfce produces this
> message (if it is some part of Xfce). The git repos (which include
> the PO files) do not seem to be searchable: a websearch for the string
> gives zero results.
>
> Does anyone have the whole of Xfce checked out and can grep for the
> above string?

The only similar string I was able to find on the entire github:
https://github.com/Snowlinux/snownotifier/blob/88fdb38594cff4a21f2df8b834446bac8d785fe4/po/nl.po#L73

Regards,
Igor