phpseclib wordpress integration not working - phpseclib

Question

i am trying to run phpseclib with Wordpress but its not logging in. the same code runs on PHP Designer 8 which has PHP v 5.* but on word press with PHP 7.3* and PHP 7.4 its not running. I got 2 error in Eventviewer
sshd: Bad packet length 980908999. [preauth]
sshd: ssh_dispatch_run_fatal: Connection from 127.0.0.1 port 15412: message authentication code incorrect [preauth]
SFTP server is Openssh
it gives 2 warnings on the webpage as follows. Can someone guide please. thanks.
Warning: unpack(): Type C: not enough input, need 1, have 0 in C:\Program Files (x86)\xampp\htdocs\testing\wp-content\plugins\sftp\phpseclib\Net\SSH2.php on line 1345
Warning: extract() expects parameter 1 to be array, bool given in C:\Program Files (x86)\xampp\htdocs\testing\wp-content\plugins\sftp\phpseclib\Net\SSH2.php on line 1345
$sftp = new Net_SFTP('127.0.0.1',22); $sftp->getLog(); if
(!$sftp->login('myuser', 'pass')) { //if you can't log on...
$sftp->getLog(); echo $sftp->getErrors();
print_r($sftp->getSFTPErrors()); echo $sftp->getSFTPLog();
exit('sftp Login Failed'); } echo $sftp->pwd();