Update app.py

app.py

@@ -374,7 +374,7 @@ def process_url(input_path, num_speakers=2, whisper_model="small.en", custom_pro
                 return json_data, summary_file_path, json_file_path, summary_file_path
 
             else:
-                return json_data, "Summary not available.", json_file_path, None
+                return json_data, "Summary not available.", json_file_path, "Summary not available."
 
         else:
             return None, "No results found.", None, None