Error when I tried to create a Workspace

I waited some time before I clicked the "Create a workspace" button and got this error.

//default/*/default/default/default?timestamp=0 @513,37 test="#

{treeManager.initialized}" //default/*/default/default/default?timestamp=0 @513,37 test="#{treeManager.initialized}

": org.nuxeo.ecm.ui.web.tree.TreeManager$$EnhancerByCGLIB$$2fadc9ed
com.sun.facelets.tag.TagAttributeException: //default/*/default/default/default?timestamp=0 @513,37 test="#

{treeManager.initialized}" //default/*/default/default/default?timestamp=0 @513,37 test="#{treeManager.initialized}

": org.nuxeo.ecm.ui.web.tree.TreeManager$$EnhancerByCGLIB$$2fadc9ed
at com.sun.facelets.tag.TagAttribute.getObject(TagAttribute.java:235)
at com.sun.facelets.tag.TagAttribute.getBoolean(TagAttribute.java:79)
at com.sun.facelets.tag.jstl.core.IfHandler.apply(IfHandler.java:49)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:109)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:240)
at org.nuxeo.theme.jsf.facelets.CompositionHandler.apply(CompositionHandler.java:144)
at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:510)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:553)
at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:101)
at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:221)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:100)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:32)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.nuxeo.ecm.ui.web.filter.SessionExpirationFilter.doFilter(SessionExpirationFilter.java:67)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.el.ELException: //default/*/default/default/default?timestamp=0 @513,37 test="#

{treeManager.initialized}

": org.nuxeo.ecm.ui.web.tree.TreeManager$$EnhancerByCGLIB$$2fadc9ed
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)
at com.sun.facelets.tag.TagAttribute.getObject(TagAttribute.java:233)
... 60 more
Caused by: javax.faces.el.EvaluationException: Bean: org.nuxeo.ecm.ui.web.tree.TreeManager$$EnhancerByCGLIB$$2fadc9ed, property: initialized
at org.nuxeo.ecm.ui.web.resolver.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:341)
at org.nuxeo.ecm.ui.web.resolver.PropertyResolverImpl.getValue(PropertyResolverImpl.java:66)
at org.nuxeo.ecm.ui.web.resolver.DocumentModelResolver.getValue(DocumentModelResolver.java:46)
at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:141)
at com.sun.el.parser.AstValue.getValue(AstValue.java:117)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:192)
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
... 61 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.nuxeo.ecm.ui.web.resolver.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:338)
... 67 more
Caused by: java.lang.RuntimeException: org.jboss.serial.exception.SerializationException: Could not create instance of org.nuxeo.ecm.ui.web.tree.TreeManagerBean$1 - org.nuxeo.ecm.ui.web.tree.TreeManagerBean$1
at org.jboss.ejb3.stateful.StatefulBeanContext.extractBeanAndInterceptors(StatefulBeanContext.java:365)
at org.jboss.ejb3.stateful.StatefulBeanContext.getInstance(StatefulBeanContext.java:309)
at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:75)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:188)
at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
at $Proxy317.isInitialized(Unknown Source)
at org.nuxeo.ecm.ui.web.tree.TreeManager$$FastClassByCGLIB$$8a3b98d7.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:73)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55)
at org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:39)
at sun.reflect.GeneratedMethodAccessor133.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
at org.jboss.seam.interceptors.ExceptionInterceptor.handleExceptions(ExceptionInterceptor.java:38)
at sun.reflect.GeneratedMethodAccessor122.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
at org.jboss.seam.interceptors.SynchronizationInterceptor.serialize(SynchronizationInterceptor.java:30)
at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
at org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:82)
at org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:51)
at org.nuxeo.ecm.ui.web.tree.TreeManager$$EnhancerByCGLIB$$2fadc9ed.isInitialized(<generated>)
... 72 more
Caused by: org.jboss.serial.exception.SerializationException: Could not create instance of org.nuxeo.ecm.ui.web.tree.TreeManagerBean$1 - org.nuxeo.ecm.ui.web.tree.TreeManagerBean$1
at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:327)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:239)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:411)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:639)
at org.jboss.serial.persister.RegularObjectPersister.readSlotWithFields(RegularObjectPersister.java:353)
at org.jboss.serial.persister.RegularObjectPersister.defaultRead(RegularObjectPersister.java:273)
at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:241)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:411)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:639)
at org.jboss.serial.persister.ArrayPersister.readObjectArray(ArrayPersister.java:196)
at org.jboss.serial.persister.ArrayPersister.readData(ArrayPersister.java:172)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:411)
at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)
at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectInput.readObject(DataContainer.java:639)
at org.jboss.serial.io.JBossObjectInputStream.readObjectOverride(JBossObjectInputStream.java:165)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.jboss.serial.io.MarshalledObject.get(MarshalledObject.java:68)
at org.jboss.ejb3.stateful.StatefulBeanContext.extractBeanAndInterceptors(StatefulBeanContext.java:342)
... 116 more
Caused by: java.lang.InstantiationException: org.nuxeo.ecm.ui.web.tree.TreeManagerBean$1
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:319)
... 135 more