Error 733 comes up after teleporting to subplace

Hi there developers! It’s me again! But this time, i’m here with a BIG issue.
So im working on a game called HORROR and the main game is in a different place, you got that?
Screenshot 2022-11-14 at 3.28.34 pm
But for a weird reason, when i join my public game, i get THIS:


I can literally work on my game, but players won’t be able to play because of this. Any ideas on how to fix it? The only stuff that comes up when i search for a solution is interfering with your network, etc
Oh yeah heres the teleport code by the way: