package shim-signed 1.48+15.4-0ubuntu5 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

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idk

ProblemType: Package
DistroRelease: Ubuntu 21.04
Package: shim-signed 1.48+15.4-0ubuntu5
ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22
Uname: Linux 5.11.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] Aucun fichier ou dossier de ce type: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
BootEFIContents:
 BOOTX64.CSV
 grub.cfg
 grubx64.efi
 mmx64.efi
 shimx64.efi
CasperMD5CheckResult: unknown
Date: Sun Jul 25 17:37:19 2021
EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: EFI variables are not supported on this system.
EFITables:

ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.9, Python 3.9.5, python3-minimal, 3.9.4-1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.20.9ubuntu1
 apt 2.2.4ubuntu0.1
SourcePackage: shim-signed
Title: package shim-signed 1.48+15.4-0ubuntu5 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to hirsute on 2021-07-25 (0 days ago)