I built and deployed Seam Booking Example without errors. I went to web browser and got application first page, with user login form. When I chose any: register new user or account login I get following exception:

17:48:38,781 INFO [STDOUT] Hibernate: select user0_.username as username2_, user0_.name as name2_, user0_.password as password2_ from User user0_ where user0_.username=? and user0_.password=?
17:48:38,812 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
java.lang.NoClassDefFoundError: javax/portlet/ActionResponse
 at org.jboss.seam.core.Manager.writeConversationIdToResponse(Manager.java:345)
 at org.jboss.seam.core.Manager.storeConversation(Manager.java:302)
 at org.jboss.seam.jsf.SeamPhaseListener.storeAnyConversationContext(SeamPhaseListener.java:235)
 at org.jboss.seam.jsf.SeamPhaseListener.beforeSaveState(SeamPhaseListener.java:189)
 at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:169)

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