rollback async solution

main.py

@@ -816,7 +816,7 @@ class HealthcareChatbot:
                 # api_response = asyncio.run(self.backend_call(router_data))
                 # loop = asyncio.get_event_loop()
                 # api_response = loop.run_until_complete(self.backend_call(router_data))
-                loop.close()
+                # loop.close()
             except:
                 print(traceback.format_exc())
             # try: