Begin: Running /scripts/casper-premount ... done.
Begin: ...waiting for devs... ... done.
touch: /dev/.initramfs/lupin-waited-for-devs: No such file or directory
stdin: Invalid argument
done.
mount: mounting /cow on /root/cow failed: No such file or directory
done.
Begin: Creating debconf-communicate fifo mechanism ... mktemp: failed to create directory via template '/tmp/debconf.XXXXXX': No such file or directory
done.
Begin: Running /scripts/casper-bottom ... Connecting to plymouth: Connection refused
Begin: Moving mount points... ... done.
Begin: Configuring fstab... ... done.
Begin: Setting up swap... ... done.
Begin: Setting up locales... ... done.
Begin: Setting up automatic login... ... done.
Begin: Disabling systemd's GPT auto generator... ... done.
Begin: Setting hostname... ... done.
Begin: Setting up console keyboard... ... done.
Begin: Applying desktop settings... ... done.
Begin: Regenerating SSL certificate... ... mktemp: failed to create file via template '/tmp/tmp.XXXXXXXXXX': No such file or directory
done.
Begin: Loading preseed file... ... done.
Begin: Adding live session user... ... passwd: password expiry information changed.
dbus-daemon[754]: [session uid=999 pid=754] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=755 comm="" label="unconfined")
dbus-daemon[754]: [session uid=999 pid=754] Successfully activated service 'org.gtk.vfs.Daemon'
dbus-daemon[754]: [session uid=999 pid=754] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=755 comm="" label="unconfined")
fuse: device not found, try 'modprobe fuse' first
dbus-daemon[754]: [session uid=999 pid=754] Successfully activated service 'org.gtk.vfs.Metadata'
A connection to the bus can't be made
done.
Begin: Setting up init... ... done.
Begin: Configuring accessibility options... ... done.
Begin: Disabling update-notifier... ... done.
Begin: Configuring power management... ... done.
Begin: Enabling detection of crashes... ... done.
Begin: Disabling unnecessary KDE services... ... done.
Begin: Fixing language selector... ... done.
Begin: Disabling trackerd... ... done.
Begin: Adding APT-CDROM source... ... mount: mounting /proc on /root/proc failed: No such file or directory
Using CD-ROM mount point /cdrom/
Identifying... [2989d5fe62b9409bc8d9bf35c6c6ba70-2]
Scanning disc for index files...
Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Ubuntu 20.04.0 2020.05.23 LTS _Custom Focal Fossa_ (20200523)'
This disc is called: 
'Ubuntu 20.04.0 2020.05.23 LTS _Custom Focal Fossa_ (20200523)'
Copying package lists...Couldn't create temporary file /tmp/apt.conf.ro7mOc for passing config to apt-key
Reading Package Indexes... 0%

Reading Package Indexes... Error!
Writing new source list
Source list entries for this disc are:
deb cdrom:[Ubuntu 20.04.0 2020.05.23 LTS _Custom Focal Fossa_ (20200523)]/ focal main restricted
Repeat this process for the rest of the CDs in your set.
E: Sub-process gpgv returned an error code (111)
W: Signature verification failed for: /cdrom/dists/focal/Release.gpg
umount: can't unmount /root/proc: No such file or directory
done.
Begin: Possibly disabling update-initramfs (useless on a live CD)... ... done.
Begin: Grant administrative PolicyKit privileges to default user... ... done.
Begin: Configuring jackd2... ... done.
Begin: Disabling unity8's first run wizard... ... done.
Begin: Disabling gnome-initial-setup... ... done.
Begin: Disabling security unattended-upgrades... ... done.
Begin: Disabling snap refresh... ... done.
Begin: Overriding 71-nvidia.rules... ... done.
Begin: Configuring pollinate... ... done.