Blender2.83 Oculus rifts VR

I use an Oculus Rift S. I did reinstall Blender(2.83 released) , the Oculus App(18.0) and windows 10 1909. Did start the “blender_oculus.cmd” File. The path in “oculus.json” is correct. Did restart my PC multiple times. Did activate and deactivate the Addon. Every time if i try to start VR Session comes this error message "Failed to query OpenXR runtime information. Do you have an active runtime set up?’’
I’m sad.