java.lang.NullPointerException
        at org.netbeans.modules.j2ee.deployment.config.ConfigSupportImpl.getModuleConfiguration(ConfigSupportImpl.java:707)
        at org.netbeans.modules.j2ee.deployment.config.ConfigSupportImpl.ensureConfigurationReady(ConfigSupportImpl.java:216)
        at org.netbeans.modules.web.project.WebProject$ProjectOpenedHookImpl.projectOpened(WebProject.java:907)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
        at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:193)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
        at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1003)
        at org.netbeans.modules.project.ui.OpenProjectList.doOpenProject(OpenProjectList.java:1051)
        at org.netbeans.modules.project.ui.OpenProjectList.doOpen(OpenProjectList.java:615)
        at org.netbeans.modules.project.ui.OpenProjectList.access$1200(OpenProjectList.java:124)
        at org.netbeans.modules.project.ui.OpenProjectList$3.run(OpenProjectList.java:505)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)