Error starting Streaming Live Demo by D-ID

Hello! I'm trying to use this example https://github.com/de-id/live-streaming-demo but it does not work.

ICE gathering status: complete
ICE status: connected
Peer connection status: connected
Signaling status: stable
Streaming status: empty

When I clicked on the start button I got this error:

api.d-id.com/talks/streams/strm_IUCjQgWKAatQoa3aeb22V:1 Failed to load resource: the server responded with a status of 402 ()

So basically, the start button does not work. Additionally, in that example I would like to pass a custom text, how can I do it?

Thanks