Ciao!
That did happen to me because I had not added this in my regedit:
C:\Program Files (x86)\Steam\steamapps\common\SteamVR\steamxr_win64.json
There is a guide on how to do it on the forums, if you need the steps look for it and you will find it 
Ciao!
That did happen to me because I had not added this in my regedit:
C:\Program Files (x86)\Steam\steamapps\common\SteamVR\steamxr_win64.json
There is a guide on how to do it on the forums, if you need the steps look for it and you will find it