i can;t upgrade my ubuntu

[iman]

ould not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

 If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If you want to investigate this yourself the log files in '/var/log/dist-upgrade' will contain details about the upgrade. Specifically, look at 'main.log' and 'apt.log'.

i give this massage

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.40
ProcVersionSignature: Ubuntu 5.15.0-59.65~20.04.1-generic 5.15.78
Uname: Linux 5.15.0-59-generic aarch64
ApportVersion: 2.20.11-0ubuntu27.25
Architecture: arm64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 26 06:42:42 2023
InstallationDate: Installed on 2023-01-26 (0 days ago)
InstallationMedia: Ubuntu 20.04.5 LTS "Focal Fossa" - Release arm64 (20230120)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2023-01-26 (0 days ago)
VarLogDistupgradeTermlog: