org.xml.sax.SAXParseException: Document root element is missing.
        at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3182)
        at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3170)
        at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:501)
        at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
        at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:442)
        at org.netbeans.core.windows.layers.WorkspaceData$PropertyHandler.readData(WorkspaceData.java:673)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.readProperties(WorkspaceData.java:286)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(WorkspaceData.java:259)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(WorkspaceData.java:627)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(WorkspaceImpl.java:878)
        at org.netbeans.core.windows.WorkspaceImpl.getDisplayName(WorkspaceImpl.java:223)
        at org.netbeans.core.windows.WorkspaceSwitcher.addNew(WorkspaceSwitcher.java:251)
        at org.netbeans.core.windows.WorkspaceSwitcher.<init>(WorkspaceSwitcher.java:83)
        at org.netbeans.core.windows.MainWindow.showWindow(MainWindow.java:191)
        at org.netbeans.core.Main.initializeMainWindow(Main.java:270)
        at org.netbeans.core.NonGui.run(NonGui.java:571)
        at org.netbeans.core.Main.run(Main.java:216)
        at org.openide.TopManager.initializeTopManager(TopManager.java:120)
        at org.openide.TopManager.getDefault(TopManager.java:81)
        at org.netbeans.core.Main.main(Main.java:325)
        at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:90)
        at java.lang.Thread.run(Thread.java:484)
java.io.IOException: Cannot parse configuration of workspace My Workspace.
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.readProperties(WorkspaceData.java:294)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(WorkspaceData.java:259)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(WorkspaceData.java:627)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(WorkspaceImpl.java:878)
        at org.netbeans.core.windows.WorkspaceImpl.getDisplayName(WorkspaceImpl.java:223)
        at org.netbeans.core.windows.WorkspaceSwitcher.addNew(WorkspaceSwitcher.java:251)
        at org.netbeans.core.windows.WorkspaceSwitcher.<init>(WorkspaceSwitcher.java:83)
        at org.netbeans.core.windows.MainWindow.showWindow(MainWindow.java:191)
        at org.netbeans.core.Main.initializeMainWindow(Main.java:270)
        at org.netbeans.core.NonGui.run(NonGui.java:571)
        at org.netbeans.core.Main.run(Main.java:216)
        at org.openide.TopManager.initializeTopManager(TopManager.java:120)
        at org.openide.TopManager.getDefault(TopManager.java:81)
        at org.netbeans.core.Main.main(Main.java:325)
        at org.netbeans.core.TopThreadGroup.run(TopThreadGroup.java:90)
        at java.lang.Thread.run(Thread.java:484)