Failed to connect with Ansible

Hello!
I’m trying to connect to several servers using ansible, but I’m receiving the error below:

$ ansible all -i xxx.xxx.xxx.xxx, -u adsm -m raw -a "echo Hello"
xxx.xxx.xxx.xxx | UNREACHABLE! => {
    "changed": false,
    "msg": "Failed to connect to the host via ssh: Permission denied (publickey,password,keyboard-interactive).",
    "unreachable": true
}

I’m able to connect to multiple servers on the same network, but I’m receiving this error on some specific servers. The target server has Python 3.7.5 installed and it’s accessible via ssh with the mentioned user.

Appreciate any help on this.

Thanks!

use -vvv to see the exact ssh command ansible is using, inspecting or using that manually normally leads to the actual issue