How are you trying to embed the chat? What code are you using?
The exact reason why it’s not working is almost definitely related to the error:
"Uncaught SecurityError: Blocked a frame with origin “http://www.twitch.tv” from accessing a frame with origin “http://www.pokemonrealtime.com.usrfiles.com”. The frame requesting access set “document.domain” to “twitch.tv”, but the frame being accessed did not. Both must set “document.domain” to the same value to allow access.t.default.Instrumentation.subscribe.after …"