(Ubuntu 16.10, non-UEFI) package shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

Dual booted pc, give error, I do not really understand what is happening, sorry. Good luck!

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-27.29-generic 4.8.1
Uname: Linux 4.8.0-27-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
AptOrdering:
 shim:amd64: Install
 shim-signed:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
BootEFIContents:
 fw
 fwupx64.efi
Date: Tue Nov 15 18:13:09 2016
Df:
 Filesystem 1K-blocks Used Available Use% Mounted on
 /dev/sda5 47797996 4679912 40660332 11% /
 /dev/sdb1 1952256 1555876 396380 80% /cdrom
 udev 8178388 0 8178388 0% /dev
 tmpfs 1645476 9832 1635644 1% /run
EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: efibootmgr: EFI variables are not supported on this system.
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.3.1
SourcePackage: shim-signed
Title: package shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)