[Bug 1500216] [NEW] Installing/Updating language support failed with "org.freedesktop.DBus.Error.NoReply" message

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Trying to add another language as the default in the system, indicates the message that "Language support is not installed completely" [screenshot1]. 
That's an ordinary message. 

When I'm clicking the "Install" button I get an error [screenshot2].

>From this point and after, I cannot call back the Language Support menu.
It does not open at all.

It will open if I restart the session and it will fail again with the
same error message.

$ sudo service lightdm restart

The "workaround" to alter the system language is to click the "Remind me
later" button instead of "Install".

How to reproduce.

1) Open the Language Support 
2) Where the message window indicates that "Language support is not installed completely" [screenshot1] hit the "Install" button. 

This bug has been filled manually, as I cannot find any crash report in
/var/crash/ folder.

Regards
NickTh

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: unity-control-center 15.04.0+15.10.20150923-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
Uname: Linux 4.2.0-11-generic x86_64
ApportVersion: 2.19-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Sep 27 17:37:15 2015
InstallationDate: Installed on 2015-09-09 (18 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150908)
SourcePackage: unity-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: language-selector (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: amd64 apport-bug third-party-packages wily
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Installing/Updating language support failed with "org.freedesktop.DBus.Error.NoReply" message
https://bugs.launchpad.net/bugs/1500216
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