Streaming Talks API not working

Hello, so I integrated streaming talks API and it was working fine a few weeks back, now I have not changed any of the code but now it is not working.

It establishes a connection but it is not able to respond after that the connection keeps getting established and I see a big loading round bar (much like a youtube video buffer) in the stream output, my code has not changed a bit but this issue is coming from your side.

Can you guys please help?