We've discovered a crash in the audio spatializer Unity plugin DLL on older CPUs without AVX. (The CPUs are officially unsupported, but we recognize that some users will still attempt to run Oculus software on them, resulting in developer support requests.)
YOU MAY GET THIS CRASH EVEN IF YOU'RE NOT USING THE AUDIO SPATIALIZER. Unity can load the DLL at runtime even if it's not used. Furthermore, in Unity, this crash will terminate the program before any diagnostic information is written to the output logs, making this somewhat difficult to identify.
The workaround for this crash is to remove the DLL from your build.