org.xwiki.rendering.macro.MacroExecutionException: Failed to evaluate Velocity Macro for content [#macro (printException $exception)
  #if($exception.message)
    {{error}}$services.localization.render('platform.wiki.error.exceptionWithMessage', [$exception.message]){{/error}}
  #else
    {{error}}$exception.class{{/error}}
  #end
#end
#set ($wikiId = $request.wikiId)
#set ($form_token = $request.form_token)
##
#if ("$!wikiId" == '')
  {{error}}{{translation key="platform.wiki.error.oneParameterNotSpecified" parameters="wikiId"/}}{{/error}}
#else
  ## FIXME: add plugin dependency checks.
  ##
  #set ($wiki = $services.wiki.getById($wikiId))
  #set ($wikiMainPage = $wiki.mainPageReference)
  #set ($wikiMainPageLinkStart = '')
  #set ($wikiMainPageLinkEnd = '')
  #if ($xwiki.exists($wikiMainPage))
    #set ($wikiMainPageLinkStart = '[[')
    #set ($wikiMainPageLinkEnd = ">>${wikiMainPage}]]")
  #end
  ##
  #if ("$!wiki" == '')
    #if ("$!{services.wiki.lastException}" != '')
      {{error}}$services.localization.render('platform.wiki.error.exceptionWithMessage', [$services.wiki.lastException.message]){{/error}}
    #else
      {{error}}$services.localization.render('platform.wiki.error.wikidoesnotexist', [$wikiId]){{/error}}
    #end
  #else
    #set ($wikiName = $wiki.prettyName)
    #if ("$!wikiName" == '')
      #set ($wikiName = $wikiId)
    #end
    #set ($currentUser = $services.model.serialize($xcontext.userReference, 'default'))
    ##
    #set ($members = $services.wiki.user.getMembers($wikiId))
    #if ($members && $members.contains($currentUser))
      {{info}}$services.localization.render('platform.wiki.users.userAlreadyMemberOfWiki', ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd]){{/info}}
    #elseif ($currentUser == 'xwiki:XWiki.XWikiGuest')
      #set ($loginDocumentReference = $services.model.createDocumentReference($services.wiki.mainWikiId, 'XWiki', 'XWikiLogin'))
      #set ($loginDocument = $xwiki.getDocument($loginDocumentReference))
      #set ($loginUrl = $loginDocument.getExternalURL('login', "xredirect=$escapetool.url($xwiki.relativeRequestURL)"))
      {{error}}$services.localization.render('platform.wiki.users.logInToContinue', ['[[', ">>$loginUrl]]"]){{/error}}
    #else
      ## The user is not already a member of the wiki
      ##
      #set ($browseDocumentReference = $services.model.createDocumentReference($services.wiki.mainWikiId, 'WikiManager', 'WebHome'))
      #set ($backUrl = $xwiki.getURL($browseDocumentReference))
      ##
      #set ($membershipType = $services.wiki.user.getMembershipType($wiki.id))
      ##
      ## Determine if, regardless of membership type, an existing invitation exists for the current user.
      #set ($invitations = $services.wiki.user.getAllInvitations($wikiId))
      #set ($existingInvitation = false)
      #if ($invitations && !$invitations.isEmpty())
        #foreach($invitation in $invitations)
          #if ($invitation.userId == $currentUser && $invitation.status == 'PENDING')
            #set ($existingInvitation = $invitation)
          #end
        #end
      #end
      #if ($existingInvitation)
        ##
        ## An invitation exists.
        #if (($request.acceptInvitation || $request.rejectInvitation) && $services.csrf.isTokenValid($form_token))
          ##
          ## The user decided whether to accept or to reject the invitation.
          #set ($notificationMessage = $services.localization.render('platform.wiki.users.invitation.userAcceptedNotification', [${xwiki.getUserName($currentUser, false)}, $currentUser, ${wikiName}, $wikiId]))
          ## Accept
          #if ($request.acceptInvitation)
            #set ($discard = $services.wiki.user.acceptInvitation($existingInvitation, $request.userComment))
          #else
            #set ($discard = $services.wiki.user.refuseInvitation($existingInvitation, $request.userComment))
          #end          
          ## Send message to wiki admins. (XWikiAdminGroup)
          #set ($wikiAdminGroupReference = $services.model.createDocumentReference($wikiId, 'XWiki', 'XWikiAdminGroup'))
          #set ($discard = $services.messageStream.postMessageToGroup($notificationMessage, $wikiAdminGroupReference))
          ## Display the proper success info.
          {{success}}
          #if ($request.acceptInvitation)
            $services.localization.render('platform.wiki.users.invitation.userAcceptedSuccess', ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd])
          #else
            $services.localization.render('platform.wiki.users.invitation.userRejectedSuccess', ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd])
          #end
          {{/success}}
        #else
          #if("$!form_token" != '')

             {{warning}}
               {{translation key="platform.wiki.csrf.error" /}}
             {{/warning}}

          #end
          ##
          ## User can decide if to accept or reject the invitation.
          {{html wiki='true'}}
          $services.localization.render('platform.wiki.users.invitation.title', [$wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd])

          <form class='xform third' method='post'>
            <dl>
            #if ("$!existingInvitation.get('reviewerComment').getValue()" != '')
              <dt>
                <label>{{translation key="platform.wiki.users.invitation.message.label"/}}</label>
              </dt>
              <dd>
                $existingInvitation.get('reviewerComment').getValue()
              </dd>
            #end  
              <dt>
                <label for='userComment'>{{translation key="platform.wiki.users.invitation.reply.title"/}}</label>
                <span class='xHint'>{{translation key="platform.wiki.users.invitation.reply.hint"/}}</span>
              </dt>
              <dd><textarea name='userComment' rows='7' cols='45'></textarea></dd>
              <span class='buttonwrapper'>
                <br/>
                <input type='submit' name='acceptInvitation' value="$services.localization.render('platform.wiki.users.invitation.accept.label')" class='button'/>
                <input type='submit' name='rejectInvitation' value="$services.localization.render('platform.wiki.users.invitation.reject.label')" class='button'/>
                <a href="$backUrl" class='button secondary'>{{translation key="platform.wiki.users.invitation.postpone.label"/}}</a>
              </span>
              <input type="hidden" name="wikiId" value="$!escapetool.xml($wikiId)" />
              <input type="hidden" name="form_token" value="$!escapetool.xml($services.csrf.getToken())" />
            </dl>
          </form>
          {{/html}}
        #end
      ##
      ## The user is not invited to join. Continue based on the current membership type of the wiki.
      #elseif ($membershipType == 'INVITE')
        ##
        ## User does not have an invitation.
        {{error}}{{translation key="platform.wiki.users.join.error.needInvitation"/}}{{/error}}
      #elseif ($membershipType == 'REQUEST')
        ## Determine if a pending request already exists.
        ##
        #set ($pendingRequest = false)
        #set ($existingRequests = $services.wiki.user.getAllRequests($wikiId))
        #foreach ($existingRequest in $existingRequests)
          #if ($existingRequest.userId == $currentUser && $existingRequest.status == 'PENDING')
            #set ($pendingRequest = $existingRequest)
          #end
        #end
        #if ($pendingRequest)
          #if ("$!{request.cancelJoinRequest}" != '1')
            ## Request already exists.
            ##
            {{info}}$services.localization.render('platform.wiki.users.join.request.pendingRequestExists', ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd]){{/info}}
          #elseif (!$services.csrf.isTokenValid($form_token))
            ## User wants to cancel existing request.
            ##
            #if("$!form_token" != '')

              {{warning}}
               {{translation key="platform.wiki.csrf.error" /}}
              {{/warning}}

            #end
            {{box}}
              $services.localization.render('platform.wiki.users.join.request.cancelConfirmation', [$wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd])
              ((({{html}}
                <form action="$doc.getURL()" method="post">
                  <fieldset>
                    <input type="hidden" name="wikiId" value="$!escapetool.xml($wikiId)" />
                    <input type="hidden" name="form_token" value="$!escapetool.xml($services.csrf.getToken())" />
                    <input type="hidden" name="cancelJoinRequest" value="1" />
                    <span class="buttonwrapper"><button class="button">$services.localization.render('platform.wiki.users.join.request.cancelYes')</button> <a class="button" href="$backUrl">$services.localization.render('platform.wiki.users.join.request.cancelNo')</a></span>
                  </fieldset>
                </form>
              {{/html}})))
            {{/box}}
          #else
            ## User confirms the cancel of existing request.
            ##
            #set ($result = $services.wiki.user.cancelCandidacy($pendingRequest))
            #if ($result)
              {{success}}$services.localization.render('platform.wiki.users.join.request.cancelSuccess',  ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd]){{/success}}
            #else
              #printException($services.wiki.user.lastException.message)
            #end
          #end
        #elseif (!$services.csrf.isTokenValid($form_token))
          ## Join request.
          ##
          #if("$!form_token" != '')

           {{warning}}
             {{translation key="platform.wiki.csrf.error" /}}
           {{/warning}}

          #end
        
          {{html wiki='true'}}
            $services.localization.render('platform.wiki.users.join.request.hint', [$wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd])

            <form class='xform third' method='GET'>
              <dl>
                <dt>
                  <label for='userComment'>{{translation key="platform.wiki.users.join.request.message.label"/}}</label>
                  <span class='xHint'>{{translation key="platform.wiki.users.join.request.message.hint"/}}</span>
                </dt>
                <dd><textarea name='userComment' rows='7' cols='45'></textarea></dd>
                <span class='buttonwrapper'>
                  <br/>
                  <input type='submit' name='submit' value="$services.localization.render('platform.wiki.users.join.request.send.label')" class='button'/>
                  <a href="$backUrl" class='button secondary'>{{translation key="platform.wiki.users.join.request.cancel.label"/}}</a>
                </span>
                <input type='hidden' name='wikiId' value="$!wikiId"/>
                <input type='hidden' name='requestJoin' value="$!request.requestJoin"/>
                <input type="hidden" name="form_token" value="$!escapetool.xml($services.csrf.getToken())" />
              </dl>
            </form>
          {{/html}}
        #else
          ## User confirmed the join request.
          ##
          #set ($request = $services.wiki.user.askToJoin($currentUser, $wikiId, $request.userComment))
          #if ($request)
            ## Send message to wiki admins. (XWikiAdminGroup)
            #set ($wikiAdminGroupReference = $services.model.createDocumentReference($wikiId, 'XWiki', 'XWikiAdminGroup'))
            #set ($notificationMessage = $services.localization.render('platform.wiki.users.join.request.saveNotification', [${xwiki.getUserName($currentUser, false)}, $currentUser, $wikiName, $wikiId]))
            #set ($discard = $services.messageStream.postMessageToGroup($notificationMessage, $wikiAdminGroupReference))
            {{success}}$services.localization.render('platform.wiki.users.join.request.success', ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd]){{/success}}
          #else
            #printException($services.wiki.user.lastException.message)
          #end
        #end
      #else
        ## Open membership as default.
        ##
        #if (!$services.csrf.isTokenValid($form_token))
          ## Open join.
          ##
          #if("$!form_token" != '')

           {{warning}}
             {{translation key="platform.wiki.csrf.error" /}}
           {{/warning}}

          #end
          {{box}}
            $services.localization.render('platform.wiki.users.join.confirmation', [$wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd])
            ((({{html}}
              <form action="$doc.getURL()" method="post">
                <fieldset>
                  <input type="hidden" name="wikiId" value="$!escapetool.xml($wikiId)" />
                  <input type="hidden" name="form_token" value="$!escapetool.xml($services.csrf.getToken())" />
                  <span class="buttonwrapper"><button class="button">$services.localization.render('platform.wiki.users.join.yes')</button> <a class="button" href="$backUrl">$services.localization.render('platform.wiki.users.join.no')</a></span>
                </fieldset>
              </form>
            {{/html}})))
          {{/box}}
        #else
          ## User confirmed to join the wiki.
          ##
          #set ($result = $services.wiki.user.join($currentUser, $wikiId))
          #if ($result)
            {{success}}$services.localization.render('platform.wiki.users.join.success', ['[[', $currentUser, ">>$currentUser]]", $wikiMainPageLinkStart, $wikiName, $wikiMainPageLinkEnd]){{/success}}
          #else
            #printException($services.wiki.user.lastException.message)
          #end
        #end
      #end
    #end
  #end
#end]
	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:139)
	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:52)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.evaluateBlock(AbstractScriptMacro.java:286)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:182)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:58)
	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:297)
	at org.xwiki.rendering.internal.transformation.DefaultRenderingContext.transformInContext(DefaultRenderingContext.java:183)
	at org.xwiki.rendering.internal.transformation.DefaultTransformationManager.performTransformations(DefaultTransformationManager.java:101)
	at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:263)
	at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:133)
	at org.xwiki.display.internal.DocumentContentDisplayer.display(DocumentContentDisplayer.java:58)
	at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:96)
	at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:39)
	at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:123)
	at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:52)
	at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:68)
	at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:42)
	at com.xpn.xwiki.doc.XWikiDocument.display(XWikiDocument.java:1202)
	at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1243)
	at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1220)
	at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:1251)
	at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:736)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
	at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
	at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
	at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.xwiki.velocity.introspection.TryCatchDirective.render(TryCatchDirective.java:87)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:847)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:723)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:698)
	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:697)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:676)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:662)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2290)
	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2268)
	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:992)
	at sun.reflect.GeneratedMethodAccessor297.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:847)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:723)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:698)
	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:697)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:676)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:662)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2290)
	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2268)
	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:992)
	at sun.reflect.GeneratedMethodAccessor297.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:847)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:723)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.lambda$renderFromSkin$0(InternalTemplateManager.java:698)
	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:697)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:676)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:662)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2290)
	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:489)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:210)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:860)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:109)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:134)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:530)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
	at java.lang.Thread.run(Unknown Source)
Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [xwiki:WikiManager.JoinWiki]
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:227)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:131)
	... 165 more
Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getAllInvitations' in  class org.xwiki.wiki.user.script.WikiUserManagerScriptService threw exception java.lang.NullPointerException at 18:xwiki:WikiManager.JoinWiki[line 55, column 42]
	at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:243)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
	at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
	at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
	at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	... 167 more
Caused by: java.lang.NullPointerException
	at org.xwiki.wiki.user.script.WikiUserManagerScriptService.canSeeCandidacy(WikiUserManagerScriptService.java:340)
	at org.xwiki.wiki.user.script.WikiUserManagerScriptService.filterAuthorizedCandidacies(WikiUserManagerScriptService.java:387)
	at org.xwiki.wiki.user.script.WikiUserManagerScriptService.getAllInvitations(WikiUserManagerScriptService.java:405)
	at sun.reflect.GeneratedMethodAccessor530.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
	... 183 more