Grub error whenever installing anything

Question

Hi guys I am having grub errors every time try to install anything on Ubuntu 20.04

sudo apt-get purge grub*
sudo apt-get install grub-efi
sudo apt-get autoremove
sudo update-grub

Already tried the solution above.

user@user-Nitro-AN515-54:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
3 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up grub-efi-amd64 (2.04-1ubuntu44) ...
dpkg: error processing package grub-efi-amd64 (--configure):
installed grub-efi-amd64 package post-installation script subprocess returned error exit status 10
No apport report written because the error message indicates its a followup error from a previous failure.
dpkg: dependency problems prevent configuration of grub-efi:
grub-efi depends on grub-efi-amd64 (>= 2.04-1ubuntu26.11); however:
Package grub-efi-amd64 is not configured yet.

dpkg: error processing package grub-efi (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of grub-efi-amd64-signed:
grub-efi-amd64-signed depends on grub-efi-amd64 | grub-pc; however:
Package grub-efi-amd64 is not configured yet.
Package grub-pc is not installed.

dpkg: error processing package grub-efi-amd64-signed (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
grub-efi-amd64
grub-efi
grub-efi-amd6-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

Answer 1

first method

step 1: you can try using --force so, try using sudo apt-get --force-yes remove --purge grub* or with dpkg sudo dpkg -P grub*

step 2: after this you can use sudo dpkg -C or dpkg --list | grep -ve 'ii\|^rc' (I would suggest trying both) and confirm that there is no grub-efi-(anything after this) package listed.

step 3: if you confirm this then you can go with sudo apt-get install grub-efi and install it and then do sudo update-grub.else go with second method

Second method

step 1:

sudo rm /var/lib/dpkg/info/grub*
sudo dpkg --configure -a
sudo apt-get update

now do step 2 and then step 3 of first method.

IMPORTANT if you successfully remove grub-efi by any method then I would suggest do not turn off your computer before installing it again