https://unity.wiki.atavismonline.com/project/atavism-virtual-machine/
The Server and the ubuntu all the latest version from Apanel.
atavism_server_10.5.0_20211023_1955.zip
AtavismUbuntuV11.ova
the ubuntu's current user is root
and I've changed all permissions of the files in Atavism_server to 777.
So how can I get to the next step: Open the http://x.x.x.x/atavism/installation/install.php
Thanks!