103: No channel resources are available. Maybe because the server cannot allocate any channel resource.
104: A timeout when looking up the channel. When a user joins a channel, the SDK looks up the specified channel. This warning usually occurs when the network conditions are too poor to connect to the server.
105: The server rejected the request to look up the channel. The server cannot process this request or the request is illegal.
106: A timeout occurred when opening the channel. Once the specific channel is found, the SDK opens the channel. This warning usually occurs when the network conditions are too poor to connect to the server.
107: The server rejected the request to open the channel. The server cannot process this request or the request is illegal.