java.lang.IllegalStateException: NbEditorDocument.createEditor(): ui=javax.swing.plaf.basic.BasicEditorPaneUI@429be960, kit=javax.swing.JEditorPane$PlainEditorKit@9f6bfca, pane=org.openide.text.QuietEditorPane[,0,0,0x0,invalid,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.basic.BasicBorders$MarginBorder@26a96be2,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=3,left=3,bottom=3,right=3],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],kit=javax.swing.JEditorPane$PlainEditorKit@9f6bfca,typeHandlers=] at org.netbeans.modules.editor.NbEditorDocument.createEditor(NbEditorDocument.java:175) at org.openide.text.CloneableEditor$DoInitialize.initCustomEditor(CloneableEditor.java:497) at org.openide.text.CloneableEditor$DoInitialize.initVisual(CloneableEditor.java:599) at org.openide.text.CloneableEditor$DoInitialize.run(CloneableEditor.java:291) at org.netbeans.core.windows.WindowManagerImpl$Exclusive$1.run(WindowManagerImpl.java:1317) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)