Mac Osx Mojave local snapshots

I just upgraded my mac to mojave and can no longer see any backup volume mounted even tho Time Machine is enabled and my disk has enough space and therefore should be used to store local backups..

tmutil listlocalsnapshots / displays : /com.apple.TimeMachine.2018-12-04-104303

So there re snapshots available but i cannot see the internal content of it through the terminal as i use to by typing ls /volumes/Mobilebackups