[SCRIPT] Error with memento

[FlawlessHappiness]

Remove this line:
CompleteQuest("memento1", "Quest_Castle1_Text");


When you use "AddQuest" you add the memento to the mementos.
When you use "CompleteQuest" you remove it.

In your OnStart you used both AddQuest and CompleteQuest, which means you both added and removed the memento again