diff --git a/sky/backends/backend_utils.py b/sky/backends/backend_utils.py
index 2521fcbcfe5..caa6c9292d5 100644
--- a/sky/backends/backend_utils.py
+++ b/sky/backends/backend_utils.py
@@ -2772,6 +2772,10 @@ def get_endpoints(cluster: str,
     cluster_records = get_clusters(include_controller=True,
                                    refresh=False,
                                    cluster_names=[cluster])
+    if not cluster_records:
+        with ux_utils.print_exception_no_traceback():
+            raise exceptions.ClusterNotUpError(
+                f'Cluster {cluster!r} not found.', cluster_status=None)
     assert len(cluster_records) == 1, cluster_records
     cluster_record = cluster_records[0]
     if (not skip_status_check and