On another attempt, I got his message:
Load debconf preconfiguration file
Failed to retrieve the preconfiguration file
The file needed for preconfiguration could not be retrieved from file:///cdrom/preseed/ubuntu-server-auto.seed. The installation will proceed in non-automated mode.
On another attempt, I got his message:
Load debconf preconfiguration file
Failed to retrieve the preconfiguration file
The file needed for preconfiguration could not be retrieved from /cdrom/ preseed/ ubuntu- server- auto.seed. The installation will proceed in non-automated mode.
file://