The error in the log is:
GRUB_CMDLINE_LINUX_DEFAULT: comando non trovato
This shows that /etc/default/grub has been locally modified to not be a correct shell snippet. This is not a bug in the grub package, but a local configuration error.
The error in the log is:
GRUB_CMDLINE_ LINUX_DEFAULT: comando non trovato
This shows that /etc/default/grub has been locally modified to not be a correct shell snippet. This is not a bug in the grub package, but a local configuration error.