Unable to establish master SSH connection Rsync Error

Hello, I have installed rsync in both servers, I have also added IP in CSF, to my other 2 servers I have added rsync with same settings but in one server when i am adding settings I am getting error. Error: Validation for transport "Data 1" failed: Can't ssh to data.domain.com: unable to establish master SSH connection: bad password or master process exited unexpectedly at /usr/local/cpanel/Cpanel/Transport/Files/Rsync.pm line 260.