java.lang.ClassNotFoundException: org.netbeans.core.actions.ViewRuntimeTabAction
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(AccessController.java:0)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
Caused: java.lang.ClassNotFoundException: org.netbeans.core.actions.ViewRuntimeTabAction starting from SystemClassLoader[447 modules] with possible defining loaders [ModuleCL@8ae59a[org.netbeans.core]] and declared parents [ModuleCL@18c458[org.netbeans.modules.maven.spring], ModuleCL@161f39e[org.netbeans.modules.java.preprocessorbridge], ModuleCL@2af8f5[org.netbeans.modules.i18n], ModuleCL@1bbbafc[org.netbeans.modules.html.editor], ModuleCL@a6cbf7[org.openidex.util], ModuleCL@1566a6c[org.netbeans.modules.web.client.tools.kit], ModuleCL@14ed577[org.netbeans.modules.core.kit], ModuleCL@1127b52[org.netbeans.modules.java.editor.lib], ModuleCL@1042fcc[org.netbeans.modules.websvc.saas.services.delicious], ModuleCL@a56214[org.netbeans.modules.ant.kit], ...432 more]
        at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:259)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at org.openide.loaders.InstanceSupport.findClass(InstanceSupport.java:497)
        at org.openide.loaders.InstanceSupport.instanceClass(InstanceSupport.java:145)
        at org.openide.loaders.InstanceDataObject$Ser.instanceClass(InstanceDataObject.java:1228)
        at org.openide.loaders.InstanceDataObject.instanceClass(InstanceDataObject.java:738)
        at org.openide.awt.MenuBar$LazyMenu$MenuFolder.acceptCookie(MenuBar.java:641)
        at org.openide.loaders.FolderInstance.acceptDataObject(FolderInstance.java:420)
        at org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:767)
        at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:101)
        at org.openide.loaders.FolderInstance$1R.init(FolderInstance.java:685)
        at org.openide.loaders.FolderInstance$1R.run(FolderInstance.java:712)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)