java.lang.IllegalStateException: The model is not initialized or is broken.
   at org.netbeans.modules.xml.xdm.XDMModel.checkStableOrParsingState(XDMModel.java:1001)
   at org.netbeans.modules.xml.xdm.XDMModel.getDocument(XDMModel.java:839)
   at org.netbeans.modules.xml.xdm.nodes.NodeImpl.getNamespaceURI(NodeImpl.java:604)
   at org.netbeans.modules.xml.xam.dom.AbstractDocumentComponent.getQName(AbstractDocumentComponent.java:778)
   at org.netbeans.modules.xml.xam.dom.AbstractDocumentComponent.getQName(AbstractDocumentComponent.java:774)
   at org.netbeans.modules.maven.model.pom.impl.POMComponentImpl.getChildElementText(POMComponentImpl.java:162)
   at org.netbeans.modules.maven.model.pom.impl.ProjectImpl.getModelVersion(ProjectImpl.java:459)
   at org.netbeans.modules.maven.navigator.POMModelVisitor.visit(POMModelVisitor.java:166)
Caused: java.lang.reflect.InvocationTargetException
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at org.netbeans.modules.maven.navigator.POMModelVisitor$PomChildren.rescan(POMModelVisitor.java:1479)
   at org.netbeans.modules.maven.navigator.POMModelVisitor$PomChildren.access$1500(POMModelVisitor.java:1413)
   at org.netbeans.modules.maven.navigator.POMModelVisitor$PomChildren$1.run(POMModelVisitor.java:1445)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)