ssh2-sftp-client: Timed out while waiting for handshake

I have set redyTimeout to 99999, but it still connects time out. I use sftp on the command line, it works to connect my host. Please some suggestions on how can I process it. Thanks.

• nodejs version: v12.16.0
• ssh2-sftp-client version: 6.13.4
• OS: macOS Mojave 10.14.6

this is code

const SftpClient = require("ssh2-sftp-client");

const sftp = new SftpClient();
sftp.connect({
    host: config.sftpHost,
    port: config.sftpPort,
    username: config.sftpID,
    password: config.sftpPW,
    protocol: "sftp",
    readyTimeout: 99999,
    debug: console.log,
    algorithms: {
        kex: [
            "diffie-hellman-group1-sha1",
            "ecdh-sha2-nistp256",
            "ecdh-sha2-nistp384",
            "ecdh-sha2-nistp521",
            "diffie-hellman-group-exchange-sha256",
            "diffie-hellman-group14-sha1"
        ],
        cipher: [
            "3des-cbc",
            "aes128-ctr",
            "aes192-ctr",
            "aes256-ctr",
            "aes128-gcm",
            "aes128-gcm@openssh.com",
            "aes256-gcm",
            "aes256-gcm@openssh.com",
            "aes256-cbc"
        ],
        serverHostKey: [
            "ssh-rsa",
            "ssh-dss",
            "ecdsa-sha2-nistp256",
            "ecdsa-sha2-nistp384",
            "ecdsa-sha2-nistp521"
        ],
        hmac: ["hmac-sha2-256", "hmac-sha2-512", "hmac-sha1"]
    }
})
    .then(() => {
        console.log("connect SFTP!!");
        return sftp.list("/");
       // return sftp.get(remotePath, dst))
    })
    .then(() => {
        console.log("connect SFTP!!");
        sftp.end();
    })
    .catch(err => {
        console.error(err.message);
    });

this is debug log

Protocol.js:125
Handshake: S->C compression: none
Protocol.js:125
Outbound: Sending KEXDH_INIT
Protocol.js:125
Received DH Reply
Protocol.js:125
Host accepted by default (no verification)
Protocol.js:125
Host accepted (verified)
Protocol.js:125
CLIENT[sftp]: getConnection: Handling error: Timed out while waiting for handshake
index.js:80
CLIENT[sftp]: getConnection: handled error with reject
index.js:80
CLIENT[sftp]: Global: Ignoring handled error
index.js:80
CLIENT[sftp]: getConnection: finally clause fired
index.js:80
Socket closed
client.js:753
CLIENT[sftp]: getConnection: handling unexpected close event
index.js:80
CLIENT[sftp]: getConnection: handling close event with reject
index.js:80
CLIENT[sftp]: Global: Ignoring handled close event
index.js:80
CLIENT[sftp]: Removing listener from ready event
index.js:80
CLIENT[sftp]: getConnection: Removing temp event listeners
index.js:80
CLIENT[sftp]: getConnection retry catch
index.js:80
CLIENT[sftp]: connect: Error getConnection: Timed out while waiting for handshake
index.js:80```