Update app.py

app.py

@@ -93,8 +93,8 @@ with gr.Blocks() as demo:
         )
 
     with gr.Tab("Keep Alive"):
-        gr.Textbox(label="Ping", value="ping", interactive=False)
-        gr.Button("Ping").click(keep_alive, inputs=None, outputs="pong")
+        box = gr.Textbox(label="Ping", value="ping", interactive=False)
+        gr.Button("Ping").click(keep_alive, inputs=None, outputs=box)
 
 # Enable request queue (multi-user safe)
 demo.queue()  # simple queue; compatible with current Gradio versions