java.lang.NullPointerException
   at org.sonatype.aether.impl.internal.DefaultMetadataResolver.resolve(DefaultMetadataResolver.java:283)
   at org.sonatype.aether.impl.internal.DefaultMetadataResolver.resolveMetadata(DefaultMetadataResolver.java:177)
   at org.apache.maven.repository.internal.DefaultVersionResolver.resolveVersion(DefaultVersionResolver.java:211)
   at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:276)
   at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:220)
   at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:197)
   at org.sonatype.aether.impl.internal.DefaultRepositorySystem.resolveArtifact(DefaultRepositorySystem.java:323)
   at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:213)
   at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:381)
   at org.apache.maven.repository.legacy.LegacyRepositorySystem.resolve(LegacyRepositorySystem.java:352)
   at org.netbeans.modules.maven.embedder.MavenEmbedder.resolve(MavenEmbedder.java:215)
   at org.netbeans.modules.maven.embedder.NBRepositoryModelResolver.resolveModel(NBRepositoryModelResolver.java:105)
   at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:819)
   at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:670)
   at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:308)
   at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:232)
   at org.netbeans.modules.maven.embedder.EmbedderFactory.createModelLineage(EmbedderFactory.java:377)
   at org.netbeans.modules.maven.configurations.ProjectProfileHandlerImpl.getLineage(ProjectProfileHandlerImpl.java:103)
   at org.netbeans.modules.maven.configurations.ProjectProfileHandlerImpl.extractProfiles(ProjectProfileHandlerImpl.java:206)
   at org.netbeans.modules.maven.configurations.ProjectProfileHandlerImpl.getAllProfiles(ProjectProfileHandlerImpl.java:115)
   at org.netbeans.modules.maven.configurations.M2ConfigProvider.createProfilesList(M2ConfigProvider.java:305)
   at org.netbeans.modules.maven.configurations.M2ConfigProvider.getConfigurations(M2ConfigProvider.java:166)
   at org.netbeans.modules.maven.configurations.M2ConfigProvider.getActiveConfiguration(M2ConfigProvider.java:237)
   at org.netbeans.modules.maven.NbMavenProjectImpl.createSystemPropsForPropertyExpressions(NbMavenProjectImpl.java:319)
   at org.netbeans.modules.maven.api.PluginPropertyUtils.createEvaluator(PluginPropertyUtils.java:482)
   at org.netbeans.modules.maven.api.PluginPropertyUtils.getPluginPropertyList(PluginPropertyUtils.java:251)
   at org.netbeans.modules.maven.NbMavenProjectImpl.getGeneratedSourceRoots(NbMavenProjectImpl.java:693)
   at org.netbeans.modules.maven.ProjectOpenedHookImpl.projectOpened(ProjectOpenedHookImpl.java:119)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:84)
   at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:196)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:84)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1134)
   at org.netbeans.modules.project.ui.OpenProjectList.access$1600(OpenProjectList.java:136)
   at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.loadOnBackground(OpenProjectList.java:431)
   at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.run(OpenProjectList.java:308)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)