Update app.py

app.py

@@ -72,7 +72,7 @@ def process(input_path, embed_html_all):
                 
                 return output_text, output_html, embed_html_all
             except (IndexError, TypeError):
-                return "Not found. Please try again."
+                return "Not found. Please try again.","",""
         time.sleep(1)
     
 '''