The error code in AgoraChannelMediaRelayError.
11: The token of the destination channel has expired.
5: Fails to accept the relay request.
4: Fails to send the relay request.
6: The server fails to receive the media stream.
7: The server fails to send the media stream.
9: An internal error occurs in the server.
3: The SDK fails to access the service, probably due to limited resources of the server.
0: The state is normal.
8: The SDK disconnects from the server due to poor network connections. You can call
leaveChannel to leave the channel.
1: An error occurs in the server response.
2: No server response. You can call the leaveChannel method to leave the channel.
10: The token of the source channel has expired.