java.lang.NoClassDefFoundError in I18nValidator

1. Create JSF 2 KickStart project.
Got the following exception in eclipse log:

java.lang.NoClassDefFoundError: org/jboss/tools/jsf/jsf2/model/JSF2ComponentModelManager
at org.jboss.tools.jsf.web.validation.i18n.I18nValidator.validate(I18nValidator.java:91)
at org.eclipse.wst.validation.Validator$V2.validate(Validator.java:1159)
at org.eclipse.wst.validation.internal.ValManager.validate(ValManager.java:704)
at org.eclipse.wst.validation.internal.ValManager$1.visit(ValManager.java:665)
at org.eclipse.wst.validation.internal.ValManager.accept(ValManager.java:810)
at org.eclipse.wst.validation.internal.ValManager.validate(ValManager.java:669)
at org.eclipse.wst.validation.internal.ValBuilderJob$Visitor.visit(ValBuilderJob.java:299)
at org.eclipse.core.internal.resources.Resource$2.visit(Resource.java:113)
at org.eclipse.core.internal.resources.Resource$1.visitElement(Resource.java:65)
at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:82)
at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86)
at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86)
at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86)
at org.eclipse.core.internal.watson.ElementTreeIterator.iterate(ElementTreeIterator.java:127)
at org.eclipse.core.internal.resources.Resource.accept(Resource.java:75)
at org.eclipse.core.internal.resources.Resource.accept(Resource.java:111)
at org.eclipse.core.internal.resources.Resource.accept(Resource.java:95)
at org.eclipse.wst.validation.internal.ValBuilderJob.fullBuild(ValBuilderJob.java:219)
at org.eclipse.wst.validation.internal.ValBuilderJob.run(ValBuilderJob.java:178)
at org.eclipse.wst.validation.internal.ValBuilderJob.runInWorkspace(ValBuilderJob.java:126)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.ClassNotFoundException: org.jboss.tools.jsf.jsf2.model.JSF2ComponentModelManager
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:513)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
... 22 more