package nvidia-kernel-common-450 450.66-0ubuntu0.20.04.1 failed to install/upgrade: installed nvidia-kernel-common-450 package post-removal script subprocess returned error exit status 1

why i cant instal nvidia graphic cards

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: nvidia-kernel-common-450 450.66-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445.1
Date: Sat Oct 3 02:15:12 2020
ErrorMessage: installed nvidia-kernel-common-450 package post-removal script subprocess returned error exit status 1
LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SourcePackage: nvidia-graphics-drivers-450
Title: package nvidia-kernel-common-450 450.66-0ubuntu0.20.04.1 failed to install/upgrade: installed nvidia-kernel-common-450 package post-removal script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)