Runlevel issue with lab

when i am trying to change the runlevel i am getting the below error

Failed to set default target: The name org.freedesktop.PolicyKit1 was not provided by any .service files

Hello, @dsmuralidharan
Normal user can’t perform system level tasks. Please use sudo before the command or switch to root user.

Regards,

i used sudo to run it, but i faced the same error

@dsmuralidharan , I have checked snd could not see any issues. Please see the screenshot for reference.