[Bug 1899995] Re: ubuntu 20.4. update-manager: “Settings & Livepatch” not starting and returning error

[cprecht2123]

** Summary changed:

- ubuntu 20.4 update-manager “Settings & Livepatch”  not starting
+ ubuntu 20.4. update-manager: “Settings & Livepatch”  not starting and returning error

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https://bugs.launchpad.net/bugs/1899995

Title:
  ubuntu 20.4. update-manager: “Settings & Livepatch”  not starting and
  returning error

Status in update-manager package in Ubuntu:
  New

Bug description:
  Bug:
  ubuntu update-manager Updates work perfectly, but when trying to open “Settings & Livepatch” the following error is returned in the terminal and “Settings & Livepatch”  does not open.

  ERROR:dbus.proxies:Introspect error on :1.172:/: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying
  Traceback (most recent call last):
    File "/usr/bin/software-properties-gtk", line 100, in <module>
      app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
    File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 211, in __init__
      self.backend.Reload();
    File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 72, in __call__
      return self._proxy_method(*args, **keywords)
    File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
      return self._connection.call_blocking(self._named_service,
    File "/usr/lib/python3/dist-packages/dbus/connection.py", line 652, in call_blocking
      reply_message = self.send_message_with_reply_and_block(
  dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name :1.172 was not provided by any .service files

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: update-manager 1:20.04.10.1
  ProcVersionSignature: Ubuntu 5.4.0-51.56-generic 5.4.65
  Uname: Linux 5.4.0-51-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.9
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Oct 15 16:51:11 2020
  InstallationDate: Installed on 2020-10-09 (5 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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