On 01/22/2016 02:32 PM, Marius Dumitru Florea wrote:
  [...]
 Is there a way to manually install this extension?
 
 You can download the XAR file from
 
http://enterprise.xwiki.org/xwiki/bin/view/Main/Download#HStable and follow
 
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/InstallationConcludingS…
 from "Alternatively you can skip ..." . But it would be better to
 understand the problem. 
Thx for the links.  I agree and I'd also prefer to understand the
problem rather than applying workarounds :-)
frank