Current questions and answers regarding the map editor.

Here is
Attachment 66218

I advise you to write the task condition manually. The task type is OBJECTIVE_KIND_MANUAL.
function Brem_Defeat(hero)
if hero=="Brem" then
SetObjectiveState("task name", OBJECTIVE_COMPLETED)
Trigger(PLAYER_REMOVE_HERO_TRIGGER, player number, nil)
print("123")
end
end

Trigger(PLAYER_REMOVE_HERO_TRIGGER, player number, "Brem_Defeat")

Again, there may be errors here