Please rest assured that we are doing everything possible to resolve this issue as quickly as we can.
Kindly note that it is related to Elsa's quest, "The Ice Cavern Mystery".
Please complete the quest by obtaining a Gold Ingot.
Please note that a Gold Ingot can not only be crafted but also has a chance to drop when feeding ravens their favorite food in the Forgotten Lands. It may also occasionally be available for purchase at Kristoff's Stall.
After completing Elsa's quest, the Crafting menu should become available again.