package grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

hmm. I do not really know, what bug this is, but atleast, after upgrading from 15 to 16, I cannot access win7 anymore (dual boot).
Other issue. Google Chrome browser is not functional at all..

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16
ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Thu Feb 8 20:51:52 2018
DuplicateSignature:
 package:grub-efi-amd64-signed:1.66.16+2.02~beta2-36ubuntu3.16
 Setting up grub-efi-amd64-signed (1.66.16+2.02~beta2-36ubuntu3.16) ...
 grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
 dpkg: error processing package grub-efi-amd64-signed (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.24
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)