com.google.gwt.event.shared.UmbrellaException: Exception caught: null 	at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:129) 	at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129) 	at com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:116) 	at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:177) 	at com.github.gwtbootstrap.client.ui.base.IconAnchor.onBrowserEvent(IconAnchor.java:241) 	at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1351) 	at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1307) 	at sun.reflect.GeneratedMethodAccessor282.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:597) 	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) 	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338) 	at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219) 	at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136) 	at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571) 	at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279) 	at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) 	at com.google.gwt.core.client.impl.Impl.apply(Impl.java) 	at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242) 	at sun.reflect.GeneratedMethodAccessor258.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:597) 	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) 	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293) 	at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547) 	at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364) 	at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.NullPointerException: null 	at org.jbpm.console.ng.ht.forms.client.editors.taskform.displayers.PlaceManagerTaskDisplayerImpl.complete(PlaceManagerTaskDisplayerImpl.java:55) 	at org.jbpm.console.ng.ht.forms.client.editors.taskform.displayers.PlaceManagerTaskDisplayerImpl.completeFromDisplayer(PlaceManagerTaskDisplayerImpl.java:116) 	at org.jbpm.console.ng.ht.forms.client.editors.taskform.displayers.AbstractHumanTaskFormDisplayer$1$6.onClick(AbstractHumanTaskFormDisplayer.java:193) 	at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:56) 	at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:1) 	at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1) 	at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40) 	at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193) 	at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88) 	at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127) 	at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129) 	at com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:116) 	at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:177) 	at com.github.gwtbootstrap.client.ui.base.IconAnchor.onBrowserEvent(IconAnchor.java:241) 	at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1351) 	at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1307) 	at sun.reflect.GeneratedMethodAccessor282.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:597) 	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) 	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338) 	at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219) 	at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136) 	at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571) 	at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279) 	at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) 	at com.google.gwt.core.client.impl.Impl.apply(Impl.java) 	at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242) 	at sun.reflect.GeneratedMethodAccessor258.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:597) 	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) 	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293) 	at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547) 	at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364) 	at java.lang.Thread.run(Thread.java:662)