package shim-signed 1.34.4+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

After the upgrade from 17.10 to 18.04

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed 1.34.4+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No existe el archivo o el directorio: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.9-0ubuntu6
Architecture: amd64
Date: Mon Apr 23 19:48:05 2018
DuplicateSignature:
 package:shim-signed:1.34.4+13-0ubuntu2
 Processing triggers for shim-signed (1.34.4+13-0ubuntu2) ...
 No MOK found.
 dpkg: error processing package shim-signed (--configure):
  installed shim-signed package post-installation script subprocess returned error exit status 1
EFITables:
 abr 23 20:11:24 th0r kernel: efi: EFI v2.40 by INSYDE Corp.
 abr 23 20:11:24 th0r kernel: efi: SMBIOS=0x9c0ef000 ESRT=0x9c1fb018 ACPI 2.0=0x9cffd014
 abr 23 20:11:24 th0r kernel: secureboot: Secure boot could not be determined (mode 0)
 abr 23 20:11:24 th0r kernel: esrt: Reserving ESRT space from 0x000000009c1fb018 to 0x000000009c1fb050.
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-03-19 (35 days ago)
InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SecureBoot: 6 0 0 0 0
SourcePackage: shim-signed
Title: package shim-signed 1.34.4+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-04-24 (0 days ago)