Making custom story and error pops up

[Sinthetic]

Have you torrented Amnesia?

Hate to admit but yes. Never thought that it would be the problem. I had no money to buy it at the time
but seems like I'm going to buy it since I liked making the story. Hopefully that is the issue, thank you all for helping

E: Though few of my friends have also ''non-legit'' versions of amnesia and they've made succesfull custom stories :I
E2: FIXED! I had to remove the monster from the first level and now it works as a dream... odd