Your character might be trying to enter a map through a teleport event, but the map doesn't exist. If you aren't trying to enter a teleport, it might just be that there is an event that teleports you , but the map that it teleports you to doesn't exist.
(pretty much the same thing)
If your character is trying to use the teleport, try editing the events teleport location.
If that doesn't work, please tell me what exactly you are trying to do. :wink: