No valid boot loader target device found. See below for details.
For a UEFI installation, you must include an EFI System Partition
on a GPT-formatted disk, mounted at /boot/efi.

$ sudo parted -l
(other info)
Partition Table: gpt
(other info)

Number  Start    End    Size    File system    Name                 Flags
2       473MB    578MB  105MB   fat32          EFI system partition boot, esp