Permission denied ssh and su - <username> login

I created an account in plinth and added an ssh public key for that user. Attempted to login with with:

ssh -p 12345
Connection closed by IPADDRESS

I am able to ssh into the FreedomBox with my admin account. I attempted the following:

su - username
su: Permission denied


sudo su - username
su: Permission denied

I’ve confirmed that the /home/username exists and it contains .profile and .bashrc both of which belong to username:users.

What might I be missing?

Hello, SSH and console access is disabled for users who are not part of the “admin” group. This restriction can be disabled from the Security app in the System section but not recommended.