Query posted on Github for lxqt-powermanagement
Maintainer replied that versions of libkf solid package and liblxqt installed with Lubuntu 24.04 are both old versions.
Distribution & Version: Lubuntu 24.04
Kernel: 6.8.0-48-generic (x86_64)
Qt Version: 5.15.13
liblxqt Version: 1.4.0-0
lxqt-build-tools Version: None?
Package version: 1.4.0-0ubuntu5
https://github.com/lxqt/lxqt-powermanagement/issues/383