I'm trying to install Lubuntu, first with dual boot with windows, then alone, and I'm not able to install it because I have always the same error when the process are going to create GRUB.

This is the error, and I don't know what am I doing wrong.

The 'grub-efi-amd64-signed' package failed to install into /target/. Without enter code here`the GRUB boot loader, the installed system will not boot

When I have tried to install it twice alone, I have created this partitions:

/dev/sda1 ext4 / /dev/sda2 efi /dev/sda3 ext4 /home /dev/sda4 ext4 /var /dev/sda5 swap

Te difference between installations is that the first time I have selected /dev/sda2 the place where create GRUB and the second time I have selected /dev/sda. And I have get it the same error explained above.

I'm trying to do the installations through USB booteable

What am I doing wrong?

I'm trying to install Lubuntu, first with dual boot with windows, then alone, and I'm not able to install it because I have always the same error when the process are going to create GRUB.

This is the error, and I don't know what am I doing wrong.

The 'grub-efi-amd64-signed' package failed to install into /target/. Without enter code here`the GRUB boot loader, the installed system will not boot

When I have tried to install it twice alone, I have created this partitions:

/dev/sda1 ext4 / /dev/sda2 efi /dev/sda3 ext4 /home /dev/sda4 ext4 /var /dev/sda5 swap 

The difference between installations is that the first time I have selected /dev/sda2 the place where create GRUB and the second time I have selected /dev/sda. And I have get it the same error explained above.

I'm trying to do the installations through USB booteable

What am I doing wrong?