The Reverb G2 requires the Mixed Reality Portal and Steam VR to be running to work with Acadicus.
The Mixed Reality Portal should automatically start up when the G2 is plugged in and detected by Windows.
If you do not have Steam VR you can get it by first installing Steam here -> https://store.steampowered.com/about/. Next create an account with Steam and login. Then install Steam VR by clicking on the [VR] button at the top right section of the Steam window.
This playlist provides lots of tips and tricks for working with Reverb G2: https://www.youtube.com/playlist?list=PLaiCvhM_u8nMzATTJw6svAXCSUoDwNbCC