Calls not work?

last docker version of MTM, on Chrome click su Call and… nothing
mic works… and speakers too… any idea ?
Maybe this feature in “mattermost-preview” not work by design ?
Thank you.

Read through Calls self-hosted deployment - Mattermost documentation There’s a lot of info about what Calls needs, and some troubleshooting steps at the bottom.

thank you !
I will read it.