Update app.py

app.py

@@ -191,7 +191,7 @@ with gr.Blocks(theme=gr.themes.Glass()) as demo:
     input1.submit(refreshmode1, mode, mode).then(user, [input1, chatbot1, state1], [input1, chatbot1, state1]).then(bot, [chatbot1, state1, mode], [chatbot1, state1])
     input2.submit(refreshmode2, mode, mode).then(user, [input2, chatbot2, state2], [input2, chatbot2, state2]).then(bot, [chatbot2, state2, mode], [chatbot2, state2])
     input3.submit(refreshmode3, mode, mode).then(user, [input3, chatbot3, state3], [input3, chatbot3, state3]).then(bot, [chatbot3, state3, mode], [chatbot3, state3])
-    clear.click(lambda: None, [None, None, None], [chatbot1, chatbot2, chatbot3], queue=True).success(init_history, [language, state1, state2, state3], [state1, state2, state3])
+    clear.click(lambda: None, None, [chatbot1, chatbot2, chatbot3], queue=True).success(init_history, [language, state1, state2, state3], [state1, state2, state3])
     language.change(lambda: None, None, [chatbot1, chatbot2, chatbot3], queue=True).success(refresh, language, [title, input1, input2, input3, chatbot1, state1, chatbot2, state2, chatbot3, state3])
 
 demo.queue()