Me too. My problem is I don’t have a headset and don’t know if that can cause issues. i have my kinect hooked up and it works with all the dev tools, but when I open SteamVR, it says “Headset not detected” at the top and “Not Ready” at the bottom. The error code is (108).
Also, when I open Driver4VR I get an error message there as well stating “Error: Unable to connect to SteamVR. Error: Init_HmdNotFoundPresenceFailed”