Is it ran in Studio or in-game? Does it output Game:CreatePlace received and error: HTTP 403 (HTTP/1.1 403 Forbidden).?
Notice
You’re creating a new place without saving. I assume this is a tutorial / training place or some sort? It’s not recommended, but I’ll still help. If this is to make a temporary place, let me know.
Ah, I’m not sure what you mean by mentors like players or NPC. For single player teleporting to temporary place, you should remove arena place id and do