Update app.py

app.py

@@ -140,6 +140,8 @@ def create_gradio_app(api_spec, api_url):
             outputs = parse_outputs(json_response["output"])
             print(outputs)
             for output in outputs:
+                if not output:
+                    continue
                 if output.startswith("data:image"):
                     # Process as image
                     base64_data = output_uri.split(",", 1)[1]