Created attachment 174768 [details]
empty Sound configuration page

SUMMARY
Opening the Sound settings from the Speaker widget open a blank configuration page

STEPS TO REPRODUCE
1. Right click the Speaker widget
2. Click Configure audio devices

OBSERVED RESULT
See the opened System Settings on a blank page

EXPECTED RESULT
The configuration opened page should properly populate with the Sound settings

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Manjaro Linux
KDE Plasma Version: 6.2.0
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.3

ADDITIONAL INFORMATION
Clearing the `.cache` folder did not help.
In the blank configuration page, you can click Configure Volume Controls button, and it brings you to the sub-page with the proper settings, and click the back arrow brings you to the blank page.
Clicking on another item in the left side menu, and then clicking back on Sound item menu, brings you to the working properly populated configuration page, not an empty one. Only when opening the Sound settings from the widget you get a blank configuration page.
It started with KDE 6.1.5 if I'm not mistaken.