update-manager crashed with apt_pkg.Error in _open_cache(): E:The repository 'http://ppa.launchpad.net/deadsnakes/ppa/ubuntu cosmic Release' does not have a Release file.

[Shamvu Chandra]

update-manager is not update.

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: update-manager 1:18.04.11
ProcVersionSignature: Ubuntu 4.15.0-21.22-generic 4.15.17
Uname: Linux 4.15.0-21-generic x86_64
ApportVersion: 2.20.10-0ubuntu2
Architecture: amd64
CrashCounter: 1
CurrentDesktop: ubuntu:GNOME
Date: Thu May 24 10:26:34 2018
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'int64 1527136239'
InstallationDate: Installed on 2017-11-11 (193 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
InterpreterPath: /usr/bin/python3.6
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/local/bin/python3.6, Python 3.6.5, unpackaged
PythonArgs: ['/usr/bin/update-manager', '--no-update', '--no-focus-on-map']
PythonDetails: /usr/bin/python2.7, Python 2.7.15, python-minimal, 2.7.15~rc1-1
SourcePackage: update-manager
Title: update-manager crashed with apt_pkg.Error in _open_cache(): E:The repository 'http://ppa.launchpad.net/deadsnakes/ppa/ubuntu cosmic Release' does not have a Release file.
UpgradeStatus: Upgraded to cosmic on 2018-05-11 (12 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1694054, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.