Preparing to unpack .../libtinfo-dev_6.1-1ubuntu1.18.04_amd64.deb ...
Unpacking libtinfo-dev:amd64 (6.1-1ubuntu1.18.04) ...
Selecting previously unselected package libncurses5-dev:amd64.
Preparing to unpack .../libncurses5-dev_6.1-1ubuntu1.18.04_amd64.deb ...
Unpacking libncurses5-dev:amd64 (6.1-1ubuntu1.18.04) ...
Setting up libtinfo-dev:amd64 (6.1-1ubuntu1.18.04) ...
Setting up grub-efi-amd64-signed (1.167~18.04.5+2.04-1ubuntu44.1.2) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package grub-efi-amd64-signed (--configure):
 installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
Setting up libncurses5-dev:amd64 (6.1-1ubuntu1.18.04) ...