Vault-ssh-helper in CentOs 6.8

Hi! Cannot run ssh vault agent on CentOs 6.8

My /etc/pam.d/sshd configuration file looks like this:

In the configuration /etc/ssh/sshd_config is set:

ChallengeResponseAuthentication yes

UsePAM yes

PasswordAuthentication no

When I check the connection with the ssh agent:

image

But when I generate a credential in Vault and try to authenticate myself:

image

Could someone help me with this? Am I missing something?