diff --git a/ui/scripts/instances.js b/ui/scripts/instances.js
index 3d5f9b8f87c..21926eaa3c6 100644
--- a/ui/scripts/instances.js
+++ b/ui/scripts/instances.js
@@ -96,6 +96,9 @@
                                     }
                                 }
                             });
+                        },
+                        error: function(json) {
+                            args.response.error(parseXMLHttpResponse(json));
                         }
                     });       
                 });