我尝试从Linux服务器连接并下载文件，但在使用jscape java库连接到服务器时遇到以下异常。
编号

package com.example.util;

import com.jscape.inet.sftp.Sftp;
import com.jscape.inet.ssh.util.SshParameters;

public class TestFTPManager
{
    private static final String hostname = "mycompany.example.com";
    private static final String username = "exampleuser";
    private static final String password = "examplepassword";
    private static final int port = 22;

    private Sftp sftpClient;

    public TestFTPManager()
    {
        this.sftpClient =  new Sftp( new SshParameters(hostname,  port, username, password ));
    }

    public void connect() throws Exception
    {
        this.sftpClient.connect();
    }

    public void setAscii() throws Exception
    {
        this.sftpClient.setAscii();
    }

    public void setBinary() throws Exception
    {
        this.sftpClient.setBinary();
    }

    public Sftp getSftpClient()
    {
        return sftpClient;
    }

    public void setSftpClient( Sftp sftpClient )
    {
        this.sftpClient = sftpClient;
    }

    public static void main(String[] args)
    {
        try
        {
            TestFTPManager sftpManager = new TestFTPManager();
            sftpManager.getSftpClient().connect(); // Error
            System.out.println( "Connection successful!" );

            // download operation is done here.

            sftpManager.getSftpClient().disconnect();
            System.out.println( "Disconnection successful!" );
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

}

错误

com.jscape.inet.sftp.SftpException: cause: java.util.NoSuchElementException: no common elements found
    at com.jscape.inet.sftp.SftpConfiguration.createClient(Unknown Source)
    at com.jscape.inet.sftp.Sftp.connect(Unknown Source)
    at com.jscape.inet.sftp.Sftp.connect(Unknown Source)
    at com.example.util.TestFTPManager.main(TestFTPManager.java:54)
Caused by: com.jscape.inet.ssh.transport.TransportException: cause: java.util.NoSuchElementException: no common elements found
    at com.jscape.inet.ssh.transport.AlgorithmSuite.<init>(Unknown Source)
    at com.jscape.inet.ssh.transport.TransportClient.getSuite(Unknown Source)
    at com.jscape.inet.ssh.transport.Transport.exchangeKeys(Unknown Source)
    at com.jscape.inet.ssh.transport.Transport.exchangeKeys(Unknown Source)
    at com.jscape.inet.ssh.transport.TransportClient.<init>(Unknown Source)
    at com.jscape.inet.ssh.transport.TransportClient.<init>(Unknown Source)
    at com.jscape.inet.ssh.SshConfiguration.createConnectionClient(Unknown Source)
    at com.jscape.inet.ssh.SshStandaloneConnector.openConnection(Unknown Source)
    ... 4 more
Caused by: java.util.NoSuchElementException: no common elements found
    at com.jscape.inet.ssh.types.SshNameList.getFirstCommonNameFrom(Unknown Source)
    at com.jscape.inet.ssh.transport.AlgorithmSuite.a(Unknown Source)
    at com.jscape.inet.ssh.transport.AlgorithmSuite.h(Unknown Source)
    ... 12 more

然而，当我在服务器的/etc/ssh/sshd_config文件中注解了以下几行（第23，23，25行）时，我可以成功地从服务器连接并下载文件，没有任何异常。

问：如何在不注解服务器中的/etc/ssh/sshd_config文件（第23、23、25行）的情况下消除此异常？我希望您能解释一下为什么我也会出现此异常。