2: Unknown common failure. The argument is invalid.
6: The number of peers, to whom you subscribe, exceeds the limit of 512.
3: RESERVED FOR FUTURE USE
4: The SDK has not received a response from the server for 10 seconds. The current timeout is set as 10 seconds. The current login timeout is set as six seconds. Possible reasons: The user is in the ABORTED or RECONNECTING state.
5: The method call frequency exceeds the limit of 10 calls every five seconds.
1: Unknown common failure. The user fails to subscribe to or unsubscribe from the status of the specified peer(s).