I've had this prob too. If you have a PC or Labtop, Or just anything you can play the game with, you must enable location services before you can auto-connect to the feralheart game, I think. Go to Settings to make sure they're on. A hotspot has a poor connection. If the nearest WiFi network has low connectivity, or is down, your device might not pick up that hotspot.
Also it looks like you have the 1.13 version of FeralHeart. Go to the feralheart home page and download the 1.15 version. Hopefully we can help you out.