efi-grub2-amd64 bbot menu didn't install

[mir oliul pasha]

though i kept for "/" about 35 gb and swap about 4 gb , efi 512mbfor ubuntu it happend, in 1st case i had efi of 200mb "/" of 12gb and 18 gb of home directory and 1 gb of boot directory . i thought as the efi is getting fulfilled so it occured but ....i have couple of ntfs patitions

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.14 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-generic 5.3.13
Uname: Linux 5.3.0-28-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CasperVersion: 1.394.3
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun 8 02:37:33 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)