diff --git a/leafmap/leafmap.py b/leafmap/leafmap.py
index c79f1828be..fd14d07b17 100644
--- a/leafmap/leafmap.py
+++ b/leafmap/leafmap.py
@@ -1150,7 +1150,10 @@ def add_stac_layer(
             nodata = None
 
         band_names = stac_bands(url, collection, item, titiler_endpoint)
-        indexes = [band_names.index(band) + 1 for band in assets]
+        if assets is not None:
+            indexes = [band_names.index(band) + 1 for band in assets]
+        else:
+            indexes = None
 
         params = {
             "url": url,
diff --git a/leafmap/stac.py b/leafmap/stac.py
index 3b9628ba6e..cf7800078a 100644
--- a/leafmap/stac.py
+++ b/leafmap/stac.py
@@ -897,10 +897,13 @@ def stac_min_max(
 
     values = stats.values()
 
-    min_values = [v["min"] for v in values]
-    max_values = [v["max"] for v in values]
+    try:
+        min_values = [v["min"] for v in values]
+        max_values = [v["max"] for v in values]
 
-    return min(min_values), max(max_values)
+        return min(min_values), max(max_values)
+    except Exception as e:
+        return None, None
 
 
 def stac_info(