java.lang.IllegalArgumentException: Called DataObject.find on null
        at org.openide.loaders.DataObject.find(DataObject.java:477)
        at org.netbeans.modules.tomcat.config.TomcatModuleConfiguration.init(TomcatModuleConfiguration.java:133)
        at org.netbeans.modules.tomcat.config.TomcatModuleConfiguration.<init>(TomcatModuleConfiguration.java:115)
        at org.netbeans.modules.tomcat.config.TomcatModuleConfigurationFactory.create(TomcatModuleConfigurationFactory.java:77)
        at org.netbeans.modules.jee.deployment.config.ConfigSupportImpl.getModuleConfiguration(ConfigSupportImpl.java:707)
        at org.netbeans.modules.jee.deployment.config.ConfigSupportImpl.ensureConfigurationReady(ConfigSupportImpl.java:216)
        at org.netbeans.modules.jee.deployment.devmodules.spi.JeeModuleProvider.fireServerChange(JeeModuleProvider.java:767)
        at org.netbeans.modules.web.project.ProjectWebModule.propertyChange(ProjectWebModule.java:534)
        at org.netbeans.spi.project.support.ant.PropertyUtils$SequentialPropertyEvaluator.stateChanged(PropertyUtils.java:876)
        at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:319)
        at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:123)
        at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:109)
        at org.netbeans.spi.project.support.ant.ProjectProperties$PP$.run(ProjectProperties.java:332)
        at org.netbeans.spi.project.support.ant.ProjectProperties$PP$.run(ProjectProperties.java:331)
        at org.openide.util.Mutex.readAccess(Mutex.java:285)
        at org.netbeans.spi.project.support.ant.ProjectProperties$PP$.run(ProjectProperties.java:346)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)