if you are not using the latest master image then
if you want shellinabox on older hardware its just
// ShellInABox
sudo apt install openssl shellinabox
sudo nano /etc/default/shellinabox
Change SHELLINABOX_ARGS="--no-beep --disable-ssl"
sudo systemctl restart shellinabox
Note that the myServer controller OS user name is "allonis" and password is also "allonis".