Namespace listing throws AccessControlException

When selecting the defaultcontent namespace, the following stacktrace is shown. It is impossible to use the template builder.

30.09.2008 11:45:44 ERROR [org.apache.wicket.RequestCycle.logRuntimeException():1432] Privileges 'admin' denied for /hippo:namespaces/defaultcontent
java.security.AccessControlException: Privileges 'admin' denied for /hippo:namespaces/defaultcontent
at org.hippoecm.repository.jackrabbit.SessionImplHelper.checkPermission(SessionImplHelper.java:160)
at org.hippoecm.repository.jackrabbit.XASessionImpl.checkPermission(XASessionImpl.java:115)
at org.hippoecm.repository.decorating.SessionDecorator.checkPermission(SessionDecorator.java:238)
at org.hippoecm.repository.impl.WorkflowManagerImpl.getWorkflowNode(WorkflowManagerImpl.java:138)
at org.hippoecm.repository.impl.WorkflowManagerImpl.getWorkflowDescriptor(WorkflowManagerImpl.java:234)
at org.hippoecm.repository.decorating.server.ServerWorkflowManager.getWorkflowDescriptor(ServerWorkflowManager.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
at $Proxy4.getWorkflowDescriptor(Unknown Source)
at org.hippoecm.repository.decorating.client.ClientWorkflowManager.getWorkflowDescriptor(ClientWorkflowManager.java:51)
at org.hippoecm.frontend.model.WorkflowsModel.initialize(WorkflowsModel.java:112)
at org.hippoecm.frontend.model.WorkflowsModel.<init>(WorkflowsModel.java:160)