diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/view/tree/AsyncTreePanel.java b/src/main/java/org/gcube/portlets/user/workspace/client/view/tree/AsyncTreePanel.java
index 63ca55f..17d8d02 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/view/tree/AsyncTreePanel.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/view/tree/AsyncTreePanel.java
@@ -705,6 +705,13 @@ public class AsyncTreePanel extends LayoutContainer {
 
 		@Override
 		public void onFailure(Throwable caught) {
+			
+			if(caught instanceof SessionExpiredException){
+				GWT.log("Session expired");
+				eventBus.fireEvent(new SessionExpiredEvent());
+				return;
+			}
+			
 			new MessageBoxAlert("Error", ConstantsExplorer.SERVER_ERROR + " getting folder children items." +ConstantsExplorer.TRY_AGAIN, null);
 			removeAllAndRecoveryRoot();