In Linux Mint 19.1, I get the error
Setting up grub-efi-amd64 (2.02-2ubuntu8.10) ...
db is empty
x509: Cannot open input file *.der, No such file or directory
x509: Use -help for summary.
dpkg: error processing package grub-efi-amd64 (--configure):
installed grub-efi-amd64 package post-installation script subprocess returned
error exit status 1
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-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)
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https://bugs.launchpad.net/bugs/1813293
Title:
package grub-efi-amd64 2.02-2ubuntu8.10 failed to install/upgrade:
installed grub-efi-amd64 package post-installation script subprocess
returned error exit status 127
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