Groovy error when connecting to SFTP server

We encountered Groovy error when connecting to SFTP server.

The error says "InvokerInvocationException com.jcraft.jsch.JSchException: Algorithm negotiation fail"

Can someone shed lights on the solution?

How to reproduce: We created a Custom Request, and added some Groovy coding.

Example:

import com.jcraft.jsch.*

//

java.util.Properties config = new java.util.Properties()

config.put("StrictHostKeyChecking", "no")

JSch ssh = new JSch()

Session sess = ssh.getSession(strUserName, strHostName, iPort)

sess.setConfig(config)

sess.with{

setPassword strPassword

connect()

Channel chan = openChannel "sftp"

chan.connect()

ChannelSftp sftp = (ChannelSftp) chan;

sftp.cd(strSourceFilePath)

sftp.put(strNewFilePathName, strSourceFileName)

chan.disconnect()

disconnect()

}