HTTP ERROR 500

Problem accessing /builds/people/. Reason:

    INTERNAL_SERVER_ERROR
Caused by:

java.lang.NullPointerException
	at java.lang.String.startsWith(String.java:1421)
	at java.lang.String.startsWith(String.java:1450)
	at hudson.maven.MavenModuleSetBuild$1.isDescendantOf(MavenModuleSetBuild.java:218)
	at hudson.maven.MavenModuleSetBuild$1.<init>(MavenModuleSetBuild.java:187)
	at hudson.maven.MavenModuleSetBuild.getChangeSetFor(MavenModuleSetBuild.java:181)
	at hudson.maven.FilteredChangeLogSet.<init>(FilteredChangeLogSet.java:51)
	at hudson.maven.MavenBuild.getChangeSet(MavenBuild.java:172)
	at hudson.model.View$People.getUserInfo(View.java:497)
	at hudson.model.View$People.<init>(View.java:475)
	at hudson.model.Hudson.getPeople(Hudson.java:854)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:282)
	at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:204)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:562)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:640)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:478)
	at org.kohsuke.stapler.Stapler.service(Stapler.java:160)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)