java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.maven.ide.eclipse.wtp.WTPProjectsUtil.isQualifiedAsWebFragment(WTPProjectsUtil.java:462)
at org.maven.ide.eclipse.wtp.WebFragmentProjectConfigurator.configure(WebFragmentProjectConfigurator.java:59)
at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:72)
at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:302)
at org.eclipse.m2e.core.ui.internal.UpdateConfigurationJob.runInWorkspace(UpdateConfigurationJob.java:87)

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