Hi I have the same issue, however...not sure it's a aaPanel issue 🙂
In my case I have a physical machine and I did a very basic Ubuntu 20.04 installation, and the added aaPanel, so the sshd was never installed in the first place, so I cannot say that it have worked.
Now... if I logon to the server I cannot install sshd using the
sudo apt-get install ssh
I get this error:
the following packages have unmet dependencies
bt-nginx119 : Depends: liblua5.1-0 but is not going to be installed
ssh: Depends: openssh-server (>= 1:8.2.p1-4ubuntu0.1 but it is not going to be installed
E: Unmet dependencies. try 'apt --fix-broken install' with no packages