According to your log multiple assets couldn’t be found during the cook process…Have you done a bunch of renaming and moving assets around? If so Fix Up Redirectors, save all and try again.
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.03.25-20.50.25:904][ 0]LogInit:Display: LogUObjectGlobals:Warning: Failed to load ‘…/…/…/…/…/…/Users/Caelan/Documents/Unreal Projects/MyProject/Content/ZROM/Inventory_System_Hud/Crafting_Menu/Crafting_Item.uasset’: Can’t find file for asset