the client error event is not triggered

[36ru]

In what cases does the event trigger - client-error?

const FtpSrv = require('ftp-srv');

const port=2121;
const ftpServer = new FtpSrv({
  url: "ftp://0.0.0.0:" + port,
  anonymous: true,
  pasv_url: '0.0.0.0',
  pasv_max: 65535,
  pasv_min: 1024
});

ftpServer.on('login', ({ connection, username, password }, resolve, reject) => {
  if(username === 'anonymous' && password === 'anonymous'){
    return resolve({ root:"/" });
  }
  return reject(new errors.GeneralError('Invalid username or password', 401));
});

ftpServer.on('client-error', (data) => {
  console.log(data);
});

ftpServer.on('server-error', ({error}) => {
  console.log(error);
});

ftpServer.listen().then(() => {
  console.log('Ftp server is starting...')
});