[Bug 1870067] [NEW] ubiquity crashed with TypeError in enable_download_updates(): Argument 1 does not allow None as a value

[Jean-Baptiste Lallement]

Public bug reported:

ubiquity-dm doesn't start

ProblemType: Crash
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.8
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
CasperVersion: 1.442
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr  1 08:53:21 2020
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
InterpreterPath: /usr/bin/python3.8
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200331)
ProcCmdline: /usr/bin/python3 /usr/lib/ubiquity/bin/ubiquity --greeter --only
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu1
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--greeter', '--only']
PythonDetails: N/A
SourcePackage: ubiquity
Title: ubiquity crashed with TypeError in enable_download_updates(): Argument 1 does not allow None as a value
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

** Affects: ubiquity (Ubuntu)
     Importance: Medium
         Status: Confirmed


** Tags: amd64 apport-crash focal ubiquity-20.04.8 ubuntu

** Information type changed from Private to Public

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https://bugs.launchpad.net/bugs/1870067

Title:
  ubiquity crashed with TypeError in enable_download_updates(): Argument
  1 does not allow None as a value

Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  ubiquity-dm doesn't start

  ProblemType: Crash
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.8
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu21
  Architecture: amd64
  CasperVersion: 1.442
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Apr  1 08:53:21 2020
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
  InterpreterPath: /usr/bin/python3.8
  LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200331)
  ProcCmdline: /usr/bin/python3 /usr/lib/ubiquity/bin/ubiquity --greeter --only
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu1
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--greeter', '--only']
  PythonDetails: N/A
  SourcePackage: ubiquity
  Title: ubiquity crashed with TypeError in enable_download_updates(): Argument 1 does not allow None as a value
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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