Category Content Module (list) 404 Error

Have created a module to list categories.

The display shows fine BUT any time I click on the category link I get a 404 error.
What am I missing?

Module params are here: screencast.com/t/fkfAxnzrKK

URL example: domain.com/category/12-ebooks.html

Hi,

Can you please :
1. Tell me if you're using a SEF extension ? if that's the case can you try it without it ?
2. Give me a link to your website for testing purpose ?

Thank you .

1. Using core SEF only
2. luznews.com/_j3/ see right side "Shop" module.