java.lang.ClassCastException: java.lang.String cannot be cast to org.json.simple.JSONObject
   at org.netbeans.modules.web.webkit.debugging.api.css.Rule.<init>(Rule.java:125)
   at org.netbeans.modules.web.webkit.debugging.api.css.MatchedStyles.<init>(MatchedStyles.java:73)
   at org.netbeans.modules.web.webkit.debugging.api.css.CSS.getMatchedStyles(CSS.java:286)
   at org.netbeans.modules.web.inspect.webkit.ui.CSSStylesSelectionPanel.updateMatchedRules(CSSStylesSelectionPanel.java:644)
   at org.netbeans.modules.web.inspect.webkit.ui.CSSStylesSelectionPanel$9.run(CSSStylesSelectionPanel.java:633)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.ClassCastException: java.lang.String cannot be cast to org.json.simple.JSONObject
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:419)
   at org.netbeans.modules.web.inspect.webkit.ui.CSSStylesSelectionPanel.updateMatchedRules(CSSStylesSelectionPanel.java:630)
   at org.netbeans.modules.web.inspect.webkit.ui.CSSStylesSelectionPanel.updateContentImpl(CSSStylesSelectionPanel.java:608)
   at org.netbeans.modules.web.inspect.webkit.ui.CSSStylesSelectionPanel$8.run(CSSStylesSelectionPanel.java:551)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)