Bug 482489

SUMMARY
Error when trying to uninstall apps, or open Discover app listing in from kickoff :

`Unable to create KIO worker. Unknown protocol 'appstream'.`

Desktop was upgraded from Plasma 5.27 (worked fine) to 6.0 (broken)

STEPS TO REPRODUCE
1. Open kickoff
2. search for an app (eg. 'libresprite')
3. select "install X"


OBSERVED RESULT
Unable to create KIO worker. Unknown protocol 'appstream'. -- dialog box

EXPECTED RESULT
Opens app listing in discover

SOFTWARE/OS VERSIONS
`$ neofetch --off`

OS: KDE neon 6.0 x86_64 
Host: 83AM Lenovo IdeaPad Pro 5 14APH8 
Kernel: 6.5.0-18-generic 
Uptime: 31 mins 
Packages: 2376 (dpkg), 23 (flatpak), 7 (snap) 
Shell: bash 5.1.16 
Resolution: 2880x1800 
DE: Plasma 6.0.0 
WM: kwin 
WM Theme: Breeze 
Theme: [Plasma], Breeze-Dark [GTK2], Breeze [GTK3] 
Icons: breeze-dark [Plasma], breeze-dark [GTK2/3] 
Terminal: konsole 
CPU: AMD Ryzen 7 7840HS (16) @ 5.137GHz 
GPU: AMD ATI 63:00.0 Device 15bf 
Memory: 3165MiB / 27736MiB 


ADDITIONAL INFORMATION
I trigged the error a few times and copied the result of `journalctl` since boot.

https://pastebin.com/2AEwH9sG