fix for 'api_mode' error

app.py

@@ -113,6 +113,7 @@ demo = gr.Interface(
     description=description,
     examples=examples,
     interpretation=interpretation,
+    _api_mode=True # Fixes error: https://github.com/gradio-app/gradio/pull/1949  
 )
 
 # %% ../main.ipynb 9