Comment 2 for bug 1826473

The real issue is:
"""
Configurando udev (229-4ubuntu21.21) ...
addgroup: El grupo `input' ya existe como grupo del sistema. Saliendo.
update-initramfs: deferring update (trigger activated)
insserv: warning: script 'K07smfpd' missing LSB tags and overrides
insserv: warning: script 'smfpd' missing LSB tags and overrides
insserv: There is a loop at service plymouth if started
insserv: There is a loop between service plymouth and procps if started
insserv: loop involving service procps at depth 2
insserv: loop involving service udev at depth 1
insserv: There is a loop at service smfpd if started
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Starting smfpd depends on plymouth and therefore on system facility `$all' which can not be true!
insserv: Max recursions depth 99 reached
insserv: loop involving service cups-browsed at depth 2
insserv: There is a loop between service smfpd and hwclock if started
insserv: loop involving service hwclock at depth 1
insserv: loop involving service checkroot at depth 3
insserv: loop involving service mountdevsubfs at depth 1
insserv: loop involving service smfpd at depth 1
insserv: loop involving service networking at depth 4
insserv: There is a loop between service smfpd and dns-clean if started
insserv: loop involving service dns-clean at depth 1
insserv: exiting now without changing boot order!
update-rc.d: error: insserv rejected the script header
dpkg: error al procesar el paquete udev (--configure):
 el subproceso instalado el script post-installation devolvió el código de salida de error 1
dpkg: problemas de dependencias impiden la configuración de snapd:
 snapd depende de udev; sin embargo:
"""