When trying to 'Update Date and Time' via clock plasmoid or the clock kcmodule, I get the error message 'Unable to authenticate/execute the action: 4,' every time. This used to work with polkit-enabled kde, not sure when it broke exactly. Reproducible: Always
I will create an upstream bug if somebody can confirm this is KDE's fault, not some polkit version that needs to be updated (there doesn't seem to be a new version for polkit-kde-agent though).
Whatever it was, it went away. Please invalidate.
Your wish is my command. :o)