Graylog2 Web Exception

gistfile1.txt

[error] play - Cannot invoke the action, eventually got an error: java.lang.NullPointerException
[error] application -

! @6mcag17e7 - Internal server error, for (GET) [/search?rangetype=relative&fields=message%2Csource&width=1436&relative=86400&q=Exception] ->

play.api.Application$$anon$1: Execution exception[[NullPointerException: null]]
	at play.api.Application$class.handleError(Application.scala:296) ~[com.typesafe.play.play_2.10-2.3.9.jar:2.3.9]
	at play.api.DefaultApplication.handleError(Application.scala:402) [com.typesafe.play.play_2.10-2.3.9.jar:2.3.9]
	at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$4.apply(PlayDefaultUpstreamHandler.scala:320) [com.typesafe.play.play_2.10-2.3.9.jar:2.3.9]
	at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$4.apply(PlayDefaultUpstreamHandler.scala:320) [com.typesafe.play.play_2.10-2.3.9.jar:2.3.9]
	at scala.Option.map(Option.scala:145) [org.scala-lang.scala-library-2.10.4.jar:na]
Caused by: java.lang.NullPointerException: null
	at controllers.SearchController.renderSearch(SearchController.java:224) ~[graylog-web-interface.graylog-web-interface-1.1.0.jar:1.1.0]
	at controllers.SearchController.index(SearchController.java:126) ~[graylog-web-interface.graylog-web-interface-1.1.0.jar:1.1.0]
	at Routes$$anonfun$routes$1$$anonfun$applyOrElse$7$$anonfun$apply$459.apply(routes_routing.scala:1659) ~[graylog-web-interface.graylog-web-interface-1.1.0.jar:na]
	at Routes$$anonfun$routes$1$$anonfun$applyOrElse$7$$anonfun$apply$459.apply(routes_routing.scala:1659) ~[graylog-web-interface.graylog-web-interface-1.1.0.jar:na]
	at play.core.Router$HandlerInvokerFactory$$anon$4.resultCall(Router.scala:264) ~[com.typesafe.play.play_2.10-2.3.9.jar:2.3.9]