While accessing Guide rule in Business Central's editor it throws NullPointerException

Issue

• While accessing new rule drafted in Guided Rule Editor, it throws NullPointerException as shown below. How to fix this problem?

14:01:52,957 INFO  [org.guvnor.m2repo.backend.server.GuvnorM2Repository] (http-/10.10.10.10:8080-3) Maven Repository root set to: repositories/kie
14:01:52,960 INFO  [org.guvnor.m2repo.backend.server.GuvnorM2Repository] (http-/10.10.10.10:8080-3) Creating Maven Repository root: repositories/kie
14:02:49,793 INFO  [org.guvnor.m2repo.backend.server.M2Servlet] (http-/10.10.10.10:8080-3) POST request received.
14:04:22,434 ERROR [stderr] (http-/10.10.10.10:8080-3) java.lang.RuntimeException: Failed to dispatch CDI Event
14:04:22,436 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.cdi.server.events.EventDispatcher.callback(EventDispatcher.java:193)
14:04:22,436 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.bus.server.DeliveryPlan.deliver(DeliveryPlan.java:47)
14:04:22,437 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.bus.server.ServerMessageBusImpl.sendGlobal(ServerMessageBusImpl.java:284)
14:04:22,437 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.bus.server.SimpleDispatcher.dispatchGlobal(SimpleDispatcher.java:46)
14:04:22,438 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:97)
14:04:22,438 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:114)
14:04:22,439 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.bus.server.servlet.DefaultBlockingServlet.doPost(DefaultBlockingServlet.java:140)
14:04:22,439 ERROR [stderr] (http-/10.10.10.10:8080-3)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
14:04:22,440 ERROR [stderr] (http-/10.10.10.10:8080-3)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
14:04:22,440 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
14:04:22,441 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
14:04:22,441 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65)
14:04:22,442 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
14:04:22,442 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
14:04:22,443 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74)
14:04:22,443 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
14:04:22,444 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
14:04:22,444 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jbpm.designer.web.filter.impl.PluggableFilter.doFilter(PluggableFilter.java:70)
14:04:22,445 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
14:04:22,445 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
14:04:22,446 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.uberfire.security.server.UberFireSecurityFilter.doFilter(UberFireSecurityFilter.java:266)
14:04:22,447 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
14:04:22,447 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
14:04:22,448 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
14:04:22,448 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
14:04:22,449 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:499)
14:04:22,449 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
14:04:22,450 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145)
14:04:22,450 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
14:04:22,451 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
14:04:22,452 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
14:04:22,452 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
14:04:22,453 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
14:04:22,453 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920)
14:04:22,454 ERROR [stderr] (http-/10.10.10.10:8080-3)  at java.lang.Thread.run(Thread.java:745)
14:04:22,455 ERROR [stderr] (http-/10.10.10.10:8080-3) Caused by: java.lang.NullPointerException
14:04:22,455 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.kie.workbench.common.services.backend.rulename.RuleNameServiceImpl.onProjectContextChange(RuleNameServiceImpl.java:91)
14:04:22,456 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.kie.workbench.common.services.backend.rulename.RuleNameServiceImpl$Proxy$_$$_WeldClientProxy.onProjectContextChange(RuleNameServiceImpl$Proxy$_$$_WeldClientProxy.java)
14:04:22,457 ERROR [stderr] (http-/10.10.10.10:8080-3)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
14:04:22,457 ERROR [stderr] (http-/10.10.10.10:8080-3)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
14:04:22,458 ERROR [stderr] (http-/10.10.10.10:8080-3)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
14:04:22,458 ERROR [stderr] (http-/10.10.10.10:8080-3)  at java.lang.reflect.Method.invoke(Method.java:606)
14:04:22,458 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.util.reflection.SecureReflections$13.work(SecureReflections.java:267)
14:04:22,459 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
14:04:22,459 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)
14:04:22,460 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:263)
14:04:22,461 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.introspector.jlr.WeldMethodImpl.invokeOnInstance(WeldMethodImpl.java:170)
14:04:22,461 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.introspector.ForwardingWeldMethod.invokeOnInstance(ForwardingWeldMethod.java:51)
14:04:22,462 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:154)
14:04:22,462 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:245)
14:04:22,463 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:233)
14:04:22,463 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:213)
14:04:22,464 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverNotifier.notifyObserver(ObserverNotifier.java:117)
14:04:22,464 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.TransactionalObserverNotifier.notifyObserver(TransactionalObserverNotifier.java:44)
14:04:22,465 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverNotifier.notifyObservers(ObserverNotifier.java:85)
14:04:22,465 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:75)
14:04:22,466 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:70)
14:04:22,466 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:562)
14:04:22,467 ERROR [stderr] (http-/10.10.10.10:8080-3)  at org.jboss.errai.cdi.server.events.EventDispatcher.callback(EventDispatcher.java:164)
14:04:22,467 ERROR [stderr] (http-/10.10.10.10:8080-3)  ... 34 more
14:04:22,468 ERROR [stderr] (http-/10.10.10.10:8080-3) *** Message delivery failure ***
14:04:22,468 ERROR [stderr] (http-/10.10.10.10:8080-3) Bus: org.jboss.errai.bus.server.ServerMessageBusImpl@14da333
14:04:22,469 ERROR [stderr] (http-/10.10.10.10:8080-3) Message: FromClient=1, BeanReference=org.guvnor.common.services.project.context.ProjectContextChangeEvent@158bca, BeanType=org.guvnor.common.services.project.context.ProjectContextChangeEvent, CommandType=CDIEvent, ToSubject=cdi.event:Dispatcher
14:04:22,469 ERROR [stderr] (http-/10.10.10.10:8080-3) errorMessage: Error calling remote service: cdi.event:Dispatcher
14:04:22,470 ERROR [stderr] (http-/10.10.10.10:8080-3) exception: java.lang.RuntimeException: Failed to dispatch CDI Event
14:04:22,470 ERROR [stderr] (http-/10.10.10.10:8080-3) disconnect: false
...