WebVR getVRDisplays() error

[Dpoletaev]

Hello!
I have a problem with WebVR API, when I call a getVRDisplays() Oculus Browser returns error: Uncaught (in promise) DOMException

Code:

navigator.getVRDisplays().then(displays => {
                    if (displays.length) {
                        VRManager.display = displays[0];
                        console.log("VR api found " + VRManager.display.displayName);
                    }
                });

but in Firefox Reality it works great, appearse only in Oculus Browser.
Maybe someone know where is a problem may be, thanks for help!