Update app.py

app.py

@@ -274,7 +274,7 @@ class LangChain_Document_QA:
           txt_msg = txt.submit(self._add_text, [chatbot, txt], [chatbot, txt]).then(
         self._suggested_answer, [chatbot,txt],chatbot
     )
-          txt_msg.then(lambda: gr.update(interactive=True), None, [txt])
+          txt_msg.then(lambda: gr.Textbox(interactive=True), None, [txt], queue=False)
           # txt.submit(self._suggested_answer, [chatbot,txt],chatbot)
           button.click(self._agent_text, [chatbot,txt3], chatbot)
           end_btn.click(self._display_history, [], txt4)