I don’t know if this might be the same case, but the user KrashBoomBang reported that his hack (Fire emblem: The Four Kings) may crash in chapters 8 and 9 when trying to use save points, but using the MGBA emulator is safe to continue. So try this one if you have it for android. [FE8][Complete] Fire Emblem: The Four Kings (8/19/22 Update: RR Quickfix)