Created attachment 129240 [details]
Window management settings bug

"More actions" > "Window management settings" option doesn't work.

It also doesn't work when started via the KDE kickoff menu or krunner.

STEPS TO REPRODUCE
1. Right click on the title bar of any application, e.g. kate
2. More actions
3. Window management settings

OBSERVED RESULT
No any settings window appears.

EXPECTED RESULT
"Window management settings" window.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.19.0
KDE Frameworks Version: 5.70.0
Qt Version: 5.15.0
Kernel Version: 5.6.15-arch1-1
OS Type: 64-bity
Processors: 8 × Intel® Core™ i7-4790K CPU @ 4.00GHz
Memory: 15,6 GiB RAM-u
Graphics Processor: GeForce GTX 980/PCIe/SSE2


ADDITIONAL INFORMATION
$kcmshell5 kwinadvanced
Couldn't load plugin "kcms/kcm_kwinoptions" : "The shared library was not found."  -- falling back to old-style loading from desktop file
Violation of memory protection (memory dump)