What do you get for 
http://pastebin.com/w5dtq0F1 ? From the stack
trace it seem there is something wrong with the activity stream
results. The problem seems to be in the displayActivity Velocity macro
(Main.Activity), around:
#set ($pageName = $page.get(0))
Hope this helps,
Marius
On Fri, Apr 4, 2014 at 2:08 PM, tduchateau <thibault.duchateau(a)gmail.com> wrote:
  Hi,
 I already looked at similar topics but none of them allowed me to solve the
 issue.
 I'm having the bellowing issue in the
 
http://my.domain/xwiki/bin/view/Main/WebHome page, i.e. where the activity
 stream is displayed by default.
 I'm running the XWIKI ENTERPRISE 5.2.4 WAR inside a Tomcat 7.0.47 container
 and behind an Apache HTTP server acting as a reverse proxy.
 OS: CentOS 6.4
 Any help would be appreciated.
 Let me know if you need more information.
 Regards,
 Thibault
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