java.lang.AssertionError: Need fully qualified name of class with the static setting factory method, but got 'SL[/IndentEngine/org-netbeans-modules-editor-java-JavaIndentEngine'
        at org.netbeans.modules.editor.lib.SettingsConversions.callFactory(SettingsConversions.java:169)
        at org.netbeans.modules.editor.NbEditorDocument$1.getValue(NbEditorDocument.java:140)
        at org.netbeans.editor.BaseDocument$LazyPropertyMap.get(BaseDocument.java:2177)
        at javax.swing.text.AbstractDocument.getProperty(AbstractDocument.java:510)
        at org.openide.text.IndentEngine.find(IndentEngine.java:161)
        at org.netbeans.modules.form.JavaCodeGenerator.regenerateVariables(JavaCodeGenerator.java:1093)
        at org.netbeans.modules.form.JavaCodeGenerator.regenerateCode(JavaCodeGenerator.java:3419)
        at org.netbeans.modules.form.JavaCodeGenerator$FormListener.formChanged(JavaCodeGenerator.java:3889)
        at org.netbeans.modules.form.FormModel.fireEvents(FormModel.java:1269)
        at org.netbeans.modules.form.FormModel.fireEventBatch(FormModel.java:1242)
        at org.netbeans.modules.form.FormModel.firePendingEvents(FormModel.java:1205)
        at org.netbeans.modules.form.FormModel.sendEventImmediately(FormModel.java:1197)
        at org.netbeans.modules.form.FormModel.fireFormToBeSaved(FormModel.java:792)
        at org.netbeans.modules.form.FormEditor.saveFormData(FormEditor.java:392)
        at org.netbeans.modules.form.FormEditor.postCreationUpdate(FormEditor.java:675)
        at org.netbeans.modules.form.FormEditor.loadFormDesigner(FormEditor.java:254)
        at org.netbeans.modules.form.FormDesigner.componentShowing(FormDesigner.java:1760)
        at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:294)
        at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:264)
        at org.netbeans.core.multiview.MultiViewPeer$SelectionListener.selectionChanged(MultiViewPeer.java:701)
        at org.netbeans.core.multiview.MultiViewModel.fireSelectionChanged(MultiViewModel.java:243)
        at org.netbeans.core.multiview.MultiViewModel.setActiveDescription(MultiViewModel.java:115)
        at org.netbeans.core.multiview.MultiViewModel$BtnGroup.setSelected(MultiViewModel.java:293)
        at javax.swing.JToggleButton$ToggleButtonModel.setSelected(JToggleButton.java:237)
        at javax.swing.ButtonGroup.setSelected(ButtonGroup.java:147)
        at org.netbeans.core.multiview.MultiViewModel$BtnGroup.setSelected(MultiViewModel.java:289)
        at javax.swing.JToggleButton$ToggleButtonModel.setSelected(JToggleButton.java:237)
        at javax.swing.AbstractButton.setSelected(AbstractButton.java:329)
        at org.netbeans.core.multiview.TabsComponent.changeActiveManually(TabsComponent.java:186)
        at org.netbeans.core.multiview.MultiViewPeer$MVTCHandler.requestActive(MultiViewPeer.java:728)
        at org.netbeans.core.api.multiview.MultiViewHandler.requestActive(MultiViewHandler.java:95)
        at org.netbeans.modules.form.FormEditorSupport.openFormEditor(FormEditorSupport.java:196)
        at org.netbeans.modules.form.FormDataNode$1.actionPerformed(FormDataNode.java:83)
        at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:1433)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.Component.processMouseEvent(Component.java:6041)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
        at java.awt.Component.processEvent(Component.java:5803)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3995)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)