Update app.py

app.py

@@ -180,6 +180,9 @@ def render_ui():
     with tabs[1]:
         st.header("Gene / Variant signals")
         for g in res['genes']:
+            # Skip non-dict entries (e.g., HTTP errors)
+            if not isinstance(g, dict):
+                continue
             sym = g.get('symbol') or g.get('name') or ''
             st.write(f"- **{sym}**")
         if res['mesh_defs']: