Packages failed to install/upgrade (crashed)

My installer froze at some point with 'shim-signed' in it. I'm afraid to restart because of the list of 'broken' packages it lists, including
grub-efi-amd64
grub-efi
less
shim-signed

I have tried to manually uninstall and reinstall to no avail - too broken to do so. I've tried to configure and reconfigure dpkg. I've removed locks as I came across them but they continue to pop up.

I need help fixing this and I'm worried rebooting will make ubuntu unbootable.

So basically: sudo apt-get -f install brings me to this:

Code:

arcane@arcane-X555LB:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  mokutil shim
Use 'sudo apt autoremove' to remove them.
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.
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
Setting up grub-efi-amd64 (2.02~beta2-36ubuntu3.2) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package grub-efi-amd64 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of grub-efi:
 grub-efi depends on grub-efi-amd64 (= 2.02~beta2-36ubuntu3.2); however:
  Package grub-efi-amd64 is not configured yet.

dpkg: error processing package grub-efi (--configure):
 dependency problems - leaving unconfigured
Setting up less (481-2.1ubuntu0.1) ...
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package less (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 grub-efi-amd64
 grub-efi
 less
E: Sub-process /usr/bin/dpkg returned an error code (1)

At some point shim-signed vanished from the list but I don't know when or what happened with that.

Any help? I'm desperately hoping I don't get a suspend crash before it's fixed.

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Packages failed to install/upgrade (crashed)