When I initiate a battle with Nel in the Ancient Ruins, it softlocks the game, If I give up, all the buttons disappear and I had to restart the game.
I know that according to the lore, nobody can use magic in the Ancient Ruins cuz it has anti-magic or smth.
I think a fix would be Nel going
"Celica, you know we can't use magic here right?" and force to leave.
Or by just hiding the "Fight her" option when in the ruins.
But I'm honestly glad that the anti-magic thing is not just a lore and the detail extends into the gameplay.