Steam audio occlusion First test

Hello everyone,
I am first not sure that audiomixer is running, while, almost all option of Steam are availbale in my editor… But my main problem is:

I have folled all the steps to start a real time audio spatialization - occlusion test. But when i generate the probe volume: 0 probe blue dots are generated. Furthemore, i can’t move the steam reverb icon and occlusion insdie the scene. Is it normal? Is someone knows a good tutorial about “first step with steam audio inside UE4.19?” Thanks.