Hello

I am new to Zen-Cart and trying to add attributes to products. I have created my option names and values but when I click on 'Attribute Controller' I am directed to a blank page. The same thing happens (directed to a blank page) when I click on the black circle with the 'A' inside on the categories/product pages.

I couldn't find anything on the 'Attributes' page from the Zen-Cart Index.

Help!