Day 11: I cannot SSH into the app server via the jump server

I have been stuck on Task 11 for two days. I don’t know how to resolve this task because I cannot SSH into the app server via the jump server. This is the error I am receiving,

thor@jumphost ~$ ssh banner@stapp03
The authenticity of host ‘stapp03 (172.16.238.12)’ can’t be established.
ED25519 key fingerprint is SHA256:jQLHF7m/tRycl3Ppn49qpOk+qkmmEyKQ1eDIcQSJffw.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added ‘stapp03’ (ED25519) to the list of known hosts.
banner@stapp03’s password:
“System is booting up. Unprivileged users are not permitted to log in yet. Please come back later. For technical details, see pam_nologin(8).”
Connection closed by 172.16.238.12 port 22

I am also facing this issue. Due to this I cannot proceed with 100 Days DevOps tasks beyond task 11.

check this repo it helps me a lot : 100-Days-Of-DevOps-KodeKloud-Challenges-Solutions

I had the same issue but they have fixed it now. I have just finished the lab.