[Migration operation] [Web to Undertow] Migration fails with java.lang.NoClassDefFoundError

13:01:52,134 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 1) WFLYCTL0013: Operation ("migrate") failed - address: ([("subsystem" => "web")]): java.lang.NoClassDefFoundError: org/wildfly/extension/undertow/UndertowExtension
	at org.jboss.as.web.WebMigrateOperation.migrateVirtualHost(WebMigrateOperation.java:572)
	at org.jboss.as.web.WebMigrateOperation.transformResources(WebMigrateOperation.java:493)
	at org.jboss.as.web.WebMigrateOperation.access$300(WebMigrateOperation.java:109)
	at org.jboss.as.web.WebMigrateOperation$2.execute(WebMigrateOperation.java:180)
	at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:846) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:637) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:362) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1272) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:394) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:225) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.doExecute(ModelControllerClientOperationHandler.java:207) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.access$300(ModelControllerClientOperationHandler.java:129) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1$1.run(ModelControllerClientOperationHandler.java:151) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1$1.run(ModelControllerClientOperationHandler.java:147) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.8.0_45]
	at javax.security.auth.Subject.doAs(Subject.java:422) [rt.jar:1.8.0_45]
	at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:92) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1.execute(ModelControllerClientOperationHandler.java:147) [wildfly-controller-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.protocol.mgmt.AbstractMessageHandler$2$1.doExecute(AbstractMessageHandler.java:298) [wildfly-protocol-2.0.0.Beta1.jar:2.0.0.Beta1]
	at org.jboss.as.protocol.mgmt.AbstractMessageHandler$AsyncTaskRunner.run(AbstractMessageHandler.java:518) [wildfly-protocol-2.0.0.Beta1.jar:2.0.0.Beta1]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_45]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_45]
	at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_45]
	at org.jboss.threads.JBossThread.run(JBossThread.java:320) [jboss-threads-2.2.1.Final.jar:2.2.1.Final]
Caused by: java.lang.ClassNotFoundException: org.wildfly.extension.undertow.UndertowExtension from [Module "org.jboss.as.web:main" from local module loader @2f333739 (finder: local module finder @77468bd9 (roots: /home/rhatlapa/projects/redhat_projects/migration/jboss-eap-7.0/modules,/home/rhatlapa/projects/redhat_projects/migration/jboss-eap-7.0/modules/system/layers/base))]
	at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:205) [jboss-modules.jar:1.4.3.Final]
	at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:455) [jboss-modules.jar:1.4.3.Final]
	at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:404) [jboss-modules.jar:1.4.3.Final]
	at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:385) [jboss-modules.jar:1.4.3.Final]
	at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:130) [jboss-modules.jar:1.4.3.Final]
	... 24 more