package:shim-signed:1.51.3+15.7-0ubuntu1
Setting up shim-signed (1.51.3+15.7-0ubuntu1) ...
update-alternatives: using /usr/lib/shim/shimx64.efi.signed.latest to provide /usr/lib/shim/shimx64.efi.signed (shimx64.efi.signed) in auto mode
mount: /var/lib/grub/esp: special device /, does not exist.
dpkg: error processing package shim-signed (--configure):
 installed shim-signed package post-installation script subprocess returned error exit status 32