java.lang.NullPointerException: <null> session name provided by: org.netbeans.spi.debugger.SessionProvider$ContextAware@7042d9
   at org.netbeans.api.debugger.DebuggerManager.startDebugging(DebuggerManager.java:325)
   at org.netbeans.modules.web.javascript.debugger.browser.NetBeansJavaScriptDebuggerFactoryImpl.createDebuggingSession(NetBeansJavaScriptDebuggerFactoryImpl.java:75)
   at org.netbeans.core.browser.webview.HtmlBrowserImpl$1.run(HtmlBrowserImpl.java:152)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException: <null> session name provided by: org.netbeans.spi.debugger.SessionProvider$ContextAware@7042d9
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:424)
   at org.netbeans.core.browser.webview.HtmlBrowserImpl.init(HtmlBrowserImpl.java:147)
   at org.netbeans.core.browser.webview.HtmlBrowserImpl.reloadDocument(HtmlBrowserImpl.java:116)
   at org.netbeans.modules.web.browser.api.WebBrowserPane$3.run(WebBrowserPane.java:249)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:691)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)