Also make sure that the magical compass is listed in your item list.
Hello, thanks for writing back and sorry for the response delay on the first place. Yeah, maybe there is a bug, I don't remember to have tested an scenario in which the player equips the magical compass. As far as I remember in the game logic, having the item in your inventory would be enough. I will give a look to the game's code and make a few tests.
Ok, I think I know what the error is, the Magical Compass is listed as a key item but it is consumable, so if you use or equip it, it will be vanished from your inventory. Do you still have your save game prior to equip the magical compass ? If so, then load that save game and don't equip the magical compass. In the meanwhile, let me think about a workaround/fix for that particular case.