13.04: cannot remove google account from ubuntu task bar (Email)

[Christopher Barrington-Leigh]

At the top of my screen is an envelope icon. When I click on it, it shows lots of information about my gmail account, and it becomes blue when there's new mail.

If I visit "online-accounts" under system settings, I find no accounts listed at all.

There is no apparent way to revoke Ubuntu's permission to access my gmail account.

The obviously-enabled access is not properly reflected in the online-accounts dialogue.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntu-settings 12.10.7
ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
Uname: Linux 3.8.0-17-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
Date: Wed Apr 10 12:37:23 2013
InstallationDate: Installed on 2013-03-18 (22 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130318)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-settings
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Olivia Watson (olivia545)]

I am also getting Gmail error 007 with my Gmail account, I have searched on the internet to find out the solution from https://gmailtechnicalsupportnumbers.com/blog/tag/gmail-error-007/ and got the reason but need a solution, yet not find the appropriate solution regarding this error. Has anyone faced this issue or have an idea regarding this kind of error? Kindly let me know.