ssh is not working correctly with HighSierra 10.13.4

[debraj-manna]

I have the latest version installed.

dmanna-a01:operations dmanna$ brew info i2cssh
i2cssh: stable 1.3, HEAD
https://github.com/djui/i2cssh
/usr/local/Cellar/i2cssh/1.3 (5 files, 6.5KB) *
  Built from source on 2018-06-04 at 16:11:43
From: /usr/local/opt/i2cssh/.brew/i2cssh.rb
==> Options
--HEAD
	Install HEAD version

But the ssh does not seem to work correctly

i2cssh -Xi=/tmp1/vnera-infra-ec2.pem -l support -b -d row -m "10.153.190.196,10.153.189.27,10.153.189.220"

Iterm2 version - 3.1.6.

Can you let me know why the ssh is not working?