Would be great if you could create an issue on 
http://jira.xwiki.org
with the complete error and the steps to reproduce.
On Mon, Aug 1, 2016 at 1:52 PM, Ramon Gomes Brandao
<ramon.brandao(a)planejamento.gov.br> wrote:
  Hi everybody,
 I've just got running a fresh new install of 8.2.1 in a Wildfly instance (9.0.x) with
datasource and PostgreSQL. No problems until there, and nothing special in config settings
other than the default ones.
 However, as I try to create a new page (child or whatever) clicking on the "+"
in any place, XE fires a NullPointerException. Here's the extract of the Stack Trace:
 Error number 4001 in 4: Error while evaluating velocity template createinline.vm
 com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while evaluating velocity
template createinline.vm
 ...
 Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id
[/templates/create.vm]
 ...
 Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method
'getParameter' in  class com.xpn.xwiki.web.XWikiServletRequest threw exception
java.lang.NullPointerException at 284:/templates/create.vm[line 90, column 31]
 ...
 Caused by: java.lang.NullPointerException
 Am I missing something in configs?
 Regards,
 RAMON GOMES BRANDÃO
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Thomas Mortagne