From a800dde0c3325e2194042a6450c24bd2a7439b95 Mon Sep 17 00:00:00 2001
From: Lorenzo Volpi <lorenzo.volpi@outlook.com>
Date: Sat, 3 Feb 2024 13:20:28 +0100
Subject: [PATCH] bug fixed in qdash/app

---
 qcdash/app.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/qcdash/app.py b/qcdash/app.py
index 8fae568..cf4f21f 100644
--- a/qcdash/app.py
+++ b/qcdash/app.py
@@ -27,6 +27,9 @@ def _get_prev_str(prev: np.ndarray):
 
 
 def rename_estimators(estimators, rev=False):
+    if estimators is None:
+        return None
+
     _rnm = _renames
     if rev:
         _rnm = {v: k for k, v in _renames.items()}