The error in your log is:
Setting up shim-signed (1.33.1~16.04.3+15+1533136590.3beb971-0ubuntu1) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package shim-signed (--configure):
Why is /boot/efi not mounted on your system?
** Changed in: shim-signed (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1814624
Title:
package shim-signed 1.33.1~16.04.3+15+1533136590.3beb971-0ubuntu1
failed to install/upgrade: subprocess installed post-installation
script returned error exit status 1
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1814624/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
