Update app.py

app.py

@@ -219,7 +219,7 @@ with gr.Blocks(
 				components=[chatbot],
 				value="Clear chat",
 			)
-	if chat_input.value is not None:
+	if chat_input.value != "":
 		chat_msg = chat_input.change(add_message, [chatbot, chat_input], [chatbot, chat_input])
 	bot_msg = chat_msg.then(bot, [chatbot, chat_input], chatbot, api_name="bot_response")
 	bot_msg.then(lambda: gr.Textbox(interactive=False), None, [chat_input])