The quest log reads to hand in five Toadskin Jackets to Maddeline. The quest log says you need the following materials for the synthesis: Steel Rivets, Steel Ingot, and 2 Toad Leathers. The actual synthesis requires 1 Diremite Sinew, 1 Aldgoat Leather, and 2 Toadskin Leathers. Upon speaking with the NPC with or without the jackets the game freezes.