问cpp_redis::subscriber ->连接导致异常: connect()失败

EN

cpp_redis::redis_subscriber *subscriber = new cpp_redis::redis_subscriber();
std::string hostIP = 12.0.0.1; // Redis server IP address
int port = 6379;
std::string password = "my_password";
bool isConnected = false;
try
{
    subscriber->connect(hostIP, port, nullptr);
    if (password != "")
    {
        subscriber->auth(password, 
          [this](const cpp_redis::reply& reply)
          {
            if (!reply.is_error()
            {
               isConnected = true;
            }
          }
        );
    }
    else
    {
        isConnected = true;
    }
}
catch (const std::exception& exs)
{
   std::cout << exs.what()) << std::endl;
}