bugfix

app.py

@@ -88,6 +88,9 @@ def fetch_groups(base_folder, datasets, old_groups, type="intersection"):
 
 
 def fetch_metrics(base_folder, datasets, group, old_metrics, type="intersection"):
+    if not group:
+        return gr.update(choices=[], value=None)
+
     with ThreadPoolExecutor() as executor:
         metrics = list(
             executor.map(lambda run: [Path(x).name for x in find_folders(base_folder, f"{run}/{group}")], datasets))