Fix

app.py

@@ -1,4 +1,5 @@
 from functools import lru_cache
+import traceback
 
 import gradio as gr
 from huggingface_hub import HfApi
@@ -51,12 +52,16 @@ def refresh_repo(repo_id: str):
     try:
         top_dirs, top_files = _extract_top_level(repo_id)
     except HfHubHTTPError as error:
+        print(f"[refresh_repo] Hub HTTP error for {repo_id}: {error}", flush=True)
+        print(traceback.format_exc(), flush=True)
         return (
             gr.Dropdown.update(choices=[], value=None, interactive=False),
             gr.Markdown.update(value=f"❌ Unable to load repo `{repo_id}`: {error}"),
             {}
         )
     except Exception as error:  # pragma: no cover - network and auth edge cases
+        print(f"[refresh_repo] Unexpected error for {repo_id}: {error}", flush=True)
+        print(traceback.format_exc(), flush=True)
         return (
             gr.Dropdown.update(choices=[], value=None, interactive=False),
             gr.Markdown.update(value=f"❌ Unexpected error loading `{repo_id}`: {error}"),
@@ -88,7 +93,12 @@ def refresh_repo(repo_id: str):
 
 
 def update_directory(repo_id: str, directory: str):
-    return _summarize_directory(repo_id, directory)
+    try:
+        return _summarize_directory(repo_id, directory)
+    except Exception as error:
+        print(f"[update_directory] Error for {repo_id}/{directory}: {error}", flush=True)
+        print(traceback.format_exc(), flush=True)
+        return {}
 
 
 with gr.Blocks(title="HF Dataset Explorer") as demo: