Comment 8 for bug 1674401

I haven't seen it for a long time, but in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=804638 last comment is from 2022.

Nevertheless, there is one thing surely worth doing whether the problem is reproducible, or not: as I checked, this error message is still present in the codebase:

```
$ apt-get source kwin
…
dpkg-source: info: rozpakowywanie kwin w kwin-5.24.7
dpkg-source: info: rozpakowywanie kwin_5.24.7.orig.tar.xz
dpkg-source: info: rozpakowywanie kwin_5.24.7-0ubuntu0.1.debian.tar.xz
…

$ cd kwin-5.24.7/

$ rg 'resources are missing'
…
src/tabbox/tabboxhandler.cpp
273: args << QStringLiteral("--passivepopup") << i18n("The Window Switcher installation is broken, resources are missing.\n"

```

This message is clearly very unclear, so whether it is likely happen, or not, it would make sense to patch it. At the very least, adding info:

- what kind of resource is missing
- which window switcher is failing

Naively looking at tabboxhandler.cpp I have feeling that the error is reported when some QML file is invalid, so probably mentioning the name of problematic file would also make sense.