Unable to install Advanced REST Client from Webstore

What steps will reproduce the problem?
1. Search Extension on Webstore
2. Hit install button

What is the expected output? 
Chrome will install the Extension after click on Install.

What do you see instead?
Message-Popup saying "An error occured. Please reload the page and try again"

On what operating system, browser and browser version?
- Chrome DEV on Ubuntu 14.04.1

Please provide any additional information below.
- Console output on error-out:
"Unchecked runtime.lastError while running 
webstorePrivate.beginInstallWithManifest3: Invalid manifest" on line 
extensions::sendRequest:82

Original issue reported on code.google.com by meykel.g...@gmail.com on 8 Sep 2014 at 6:45

Attachments:

[Bildschirmfoto von »2014-09-08 08:45:03«.png](https://storage.googleapis.com/google-code-attachments/chrome-rest-client/issue-271/comment-0/Bildschirmfoto von »2014-09-08 08:45:03«.png)
[Bildschirmfoto von »2014-09-08 08:45:19«.png](https://storage.googleapis.com/google-code-attachments/chrome-rest-client/issue-271/comment-0/Bildschirmfoto von »2014-09-08 08:45:19«.png)

719wangqi / chrome-rest-client

Unable to install Advanced REST Client from Webstore #271