Please submit a support ticket for help. https://support.oculus.com/
I get this from time to time, normally when I let the computer use SLEEP instead of shut down. What I do is open SERVICES, look for Oculus VR Runtime Service, highight it, then press the STOP word. Wait for the service to....ummm... Stop. Then wait another two or four heartbeats, then hit START to ....Well... Yeah, Start the service.The Oculus Rift app should open, now, if it does not, then double click the shortcut to open it, and then try on the mask.Should now be working. Or at least it works for me.
It looks like you're new here. If you want to get involved, click one of these buttons!