Fyers API V2 "Looks like you passed an invalid entry"

Facing the issue {'s': 'error', 'code': 500, 'message': 'Looks like you are passing an invalid entry'} after getting the access_token and passing it in the FyersModel.

        appSession.set_token(auth_code)

       response = appSession.generate_token()

       access_token = response["access_token"]

       print(access_token)

       fyers = fyersModel.FyersModel(is_async=False, client_id=fyers_id, token=access_token,log_path="C:/Users/user1/Desktop")

       is_async = True

       print(fyers.get_profile())