org.apache.maven.artifact.InvalidArtifactRTException: For artifact {org.codehaus.plexus:plexus-compilers:null:pom}: The version cannot be empty.
   at org.apache.maven.artifact.DefaultArtifact.validateIdentity(DefaultArtifact.java:148)
   at org.apache.maven.artifact.DefaultArtifact.<init>(DefaultArtifact.java:123)
   at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:157)
   at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:117)
   at org.apache.maven.artifact.factory.DefaultArtifactFactory.createArtifact(DefaultArtifactFactory.java:111)
   at org.apache.maven.artifact.factory.DefaultArtifactFactory.createBuildArtifact(DefaultArtifactFactory.java:75)
   at org.apache.maven.repository.legacy.LegacyRepositorySystem.createArtifact(LegacyRepositorySystem.java:123)
   at org.netbeans.modules.maven.embedder.MavenEmbedder.createArtifact(MavenEmbedder.java:201)
   at org.netbeans.modules.maven.navigator.POMModelPanel.run(POMModelPanel.java:313)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: org.apache.maven.artifact.InvalidArtifactRTException: For artifact {org.codehaus.plexus:plexus-compilers:null:pom}: The version cannot be empty.
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.netbeans.modules.maven.navigator.POMModelPanel.navigate(POMModelPanel.java:276)
   at org.netbeans.modules.maven.navigator.POMModelNavigator.navigate(POMModelNavigator.java:126)
   at org.netbeans.modules.maven.navigator.POMModelNavigator$1.resultChanged(POMModelNavigator.java:68)
   at org.netbeans.modules.maven.navigator.POMModelNavigator.panelActivated(POMModelNavigator.java:100)
   at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java:391)
   at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java:277)
   at org.netbeans.modules.navigator.NavigatorController.access$900(NavigatorController.java:102)
   at org.netbeans.modules.navigator.NavigatorController$ActNodeSetter.run(NavigatorController.java:729)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
   at java.awt.EventQueue.access$000(EventQueue.java:85)
   at java.awt.EventQueue$1.run(EventQueue.java:603)
   at java.awt.EventQueue$1.run(EventQueue.java:601)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
   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)