Install grub-efi by entering the following commands in the terminal:
sudo apt update sudo apt install grub-efi
Description:
GRand Unified Bootloader, version 2 (dummy package)
This is a dummy transitional package that depends on either grub-efi-ia32 or grub-efi-amd64, depending on the architecture.
Homepage: http://www.gnu.org/software/grub/
Version: 2.02-2ubuntu8
Section: admin