java.lang.NullPointerException
   at org.netbeans.api.debugger.ActionsManager.registerActionsProviders(ActionsManager.java:428)
   at org.netbeans.api.debugger.ActionsManager.initActionImpls(ActionsManager.java:446)
   at org.netbeans.api.debugger.ActionsManager.isEnabled(ActionsManager.java:260)
   at org.netbeans.modules.debugger.ui.actions.DebuggerAction.isEnabled(DebuggerAction.java:127)
   at org.netbeans.modules.debugger.ui.actions.DebuggerAction.access$000(DebuggerAction.java:73)
   at org.netbeans.modules.debugger.ui.actions.DebuggerAction$Listener.propertyChange(DebuggerAction.java:374)
   at org.netbeans.api.debugger.DebuggerManager.firePropertyChange(DebuggerManager.java:762)
   at org.netbeans.api.debugger.DebuggerManager.setCurrentSession(DebuggerManager.java:485)
   at org.netbeans.api.debugger.DebuggerManager.startDebugging(DebuggerManager.java:387)
   at org.netbeans.api.debugger.jpda.JPDADebugger.startListeningAndGetEngines(JPDADebugger.java:251)
   at org.netbeans.api.debugger.jpda.JPDADebugger.startListening(JPDADebugger.java:222)
   at org.netbeans.modules.maven.debug.JPDAStart$1.run(JPDAStart.java:181)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)