Errors while installing the package

[Sachin-Bhat]

I tried installing this package via the Install new widgets and also the repo. Getting the foolowing error:

kf.package: Invalid metadata for package structure "Plasma/Applet"
Package type "Plasma/Applet" not found
Providing a metadata.desktop file for KPackage metadata is deprecated. Please convert this file using the following command or contact the author:
"desktoptojson /home/sachin/Downloads/Simple-Kickoff-for-Plasma/metadata.desktop; rm /home/sachin/Downloads/Simple-Kickoff-for-Plasma/metadata.desktop"
kf.coreaddons.desktopparser: Unable to find service type for service "Plasma/Applet" listed in "/home/sachin/Downloads/Simple-Kickoff-for-Plasma/metadata.desktop" - service type search directories were ("/home/sachin/.local/share", "/home/sachin/.local/share/flatpak/exports/share", "/var/lib/flatpak/exports/share", "/usr/local/share", "/usr/share")

Kindly help me.

Regards,
Sachin

[HimDek]

What command did you use and which Plasma version?
If Plasma 6 use kpackagetool6 instead of kpackagetool5