Prestashop Project - Category Creation Issue & BO Shipping Configuration

I am having 2 websites. Both are prestashop 1.6x. The one which is in catalog mode and which is simple, I am getting error as "An error occurred while creating an object. category ()" while creating new category from BO. I need someone who knows properly presta 1.6x to resolve this issue. Error Screenshot is attached..... Another task is just shipping configuration in BO. Shipping modules are already installed and configured. Due to lack of time I need someone for configuration. Thus both tasks are much easier so quote reasonable amount.