Update app.py

app.py

@@ -140,7 +140,10 @@ def demo():
 
         submit_btn.click(conversation, inputs=[qa_chain, msg, chatbot], outputs=[qa_chain, msg, chatbot] + doc_sources + source_pages)
         msg.submit(conversation, inputs=[qa_chain, msg, chatbot], outputs=[qa_chain, msg, chatbot] + doc_sources + source_pages)
-        clear_btn.click(lambda: (qa_chain.reset(), chatbot.clear(), *[doc_source.clear() for doc_source in doc_sources], *[source_page.clear() for source_page in source_pages]), inputs=[qa_chain, chatbot, *doc_sources, *source_pages])
+        clear_btn.click(lambda:[None,"",0], \
+            inputs=None, \
+            outputs=[chatbot, doc_sources, source_pages], \
+            queue=False)
         
     demo.queue().launch(debug=True)