Make sure that you post the entire log as a .txt file. You can upload it with your next response.
The errors that you posted above point towards your blueprints. Look at the class pin for Alluminium.Alluminium_C because it’s not a valid subclass of ItemMaster_C. The class pin is also invalid for Cloth.Cloth_C and it’s not a valid subclass of ItemMaster_C either.