Amazon Echo show 8 and camera

Hello I have the Nabu Casa actived and I add the skill Home asistsant (not find home asistant smart home)
I have selected with the cloud the device I want to find and selected the camera and binary open close sensor.

In Alexa phone and Echo show 8 i can see the device camera and the binary_sensor. I can receive the information about the binary sensor open or closed but i don’t show the stream of the camera. When I ask to Alexa show me 'name of camera a new screen comme and showing waiting : home assistant.

Can you help me ?