I wanted to try MAAS out so I installed the server in VirtualBox VM. After installation completion, nothing seemed to happen. I got "Internal server problem" when I tried accessing xxx.xxx.xxx.xxx/MAAS. I already update and ran
sudo maas createsuperuser but nothing seemed to change.
Looking at Apache2 log I found a lot of python error. At the end of the stack is
DBUSException: org.freedesktop.DBus.Error.Spawn.FileInvalid: Cannot do system-bus activation with no-user.