when i check the mission it returns somekind of class Rookie that was not in included in the mission. please remove that class from the Check.

From: https://py.checkio.org/mission/the-defenders/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36