Good you're on right track, I see you have a locations tab open, that's where you'll find your map. Go through the locations one by one till you find it (it's probably got the wrong name since this is a rom hack)
Once you find it it's only one of two things that could be wrong. Either there's no exit or it's got a bad tile blocking the exit.
Once you've found your location you see the "Exits" on the left bar, when you click that red boxes will come up on the screen to mark the exits, tell me if there's a red box in the right spot when you do.