This may have already been addressed in a previous post, but my friends and I, can not craft certain items, the main ones being Ark of the Ancients and the Elemental Disk. We have the newest version of tModLoader, and we updated the Calamity mod within a week ago. Along side the Calamity Mod, we have Boss Checklist, Recipe Browser, Which Mod Is This From?, No more Tombs, More Chest Loot, AlchemistNPC, Yet another Boss HP bar, Luiafk, Magic Storage, Shorter Respawn Time, and Sacredtools. My friend disabled all mods aside from Calamity and attempted to craft the Elemental Disk, but it would not work. We checked the Wiki and the recipe browser. He used the Ancient Manipulator along side the required materials, and it would not work. He tried in another world as well.