You appear to have the 'grub' package installed on your system. If you are on an EFI system, you must be using grub2. Please install the grub-efi-amd64 package to fix this issue.
You appear to have the 'grub' package installed on your system. If you are on an EFI system, you must be using grub2. Please install the grub-efi-amd64 package to fix this issue.