[Bug 2139661] [NEW] After upgrading from 24.04 to 25.10 the Software Update app crashes on launch

[Christo]

Public bug reported:

Software updater crashes with the following message:
"Failed to Update Cache"
"Refreshing the cache failed.

Please report this bug against the 'update-manager' package and include
the thread traceback from the terminal."

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: ubuntu-release-upgrader-core 1:25.10.8
ProcVersionSignature: Ubuntu 6.17.0-12.12-generic 6.17.2
Uname: Linux 6.17.0-12-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CrashReports:
 640:1000:109:109543:2026-01-31 08:10:01.172715570 +0200:2026-01-31 08:10:01.171715608 +0200:/var/crash/_usr_bin_update-manager.1000.crash
 644:1000:109:0:2026-01-31 08:09:58.002737038 +0200:2026-01-31 08:09:58.002737038 +0200:/var/crash/_usr_bin_update-manager.1000.upload
 600:107:109:37:2026-01-31 08:10:03.200493994 +0200:2026-01-31 08:10:03.199618004 +0200:/var/crash/_usr_bin_update-manager.1000.uploaded
CurrentDesktop: ubuntu:GNOME
Date: Tue Feb  3 08:31:14 2026
InstallationDate: Installed on 2025-06-26 (222 days ago)
InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade questing third-party-packages wayland-session

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https://bugs.launchpad.net/bugs/2139661

Title:
  After upgrading from 24.04 to 25.10 the Software Update app crashes on
  launch

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Software updater crashes with the following message:
  "Failed to Update Cache"
  "Refreshing the cache failed.

  Please report this bug against the 'update-manager' package and
  include the thread traceback from the terminal."

  ProblemType: Bug
  DistroRelease: Ubuntu 25.10
  Package: ubuntu-release-upgrader-core 1:25.10.8
  ProcVersionSignature: Ubuntu 6.17.0-12.12-generic 6.17.2
  Uname: Linux 6.17.0-12-generic x86_64
  ApportVersion: 2.33.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports:
   640:1000:109:109543:2026-01-31 08:10:01.172715570 +0200:2026-01-31 08:10:01.171715608 +0200:/var/crash/_usr_bin_update-manager.1000.crash
   644:1000:109:0:2026-01-31 08:09:58.002737038 +0200:2026-01-31 08:09:58.002737038 +0200:/var/crash/_usr_bin_update-manager.1000.upload
   600:107:109:37:2026-01-31 08:10:03.200493994 +0200:2026-01-31 08:10:03.199618004 +0200:/var/crash/_usr_bin_update-manager.1000.uploaded
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Feb  3 08:31:14 2026
  InstallationDate: Installed on 2025-06-26 (222 days ago)
  InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: No upgrade log present (probably fresh install)
  VarLogDistupgradeTermlog:

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