NULL texture provided to ovrLayerType_EyeFov. Disabling Layer 0

Where and when did this happen?

More details.  If this is happening a lot you need to post it in the Support section.  If it is serious you also need to read how to post log files, and post log files.

https://forums.oculus.com/community/discussion/33792/how-to-get-logs-for-bug-reports-for-consumer-rift-1-3/p1

If you are developing something you can do the above and possibly ask in the Developer forum.

Was trying to use the QVR library (https://github.com/marlam/qvr) to port our opengl application to oculus rift. It was working okay, but since I did a repair Oculus installation, it reports the above issues in the qvr debug log. 

Moving to PC developer section.