get_posts wont produce a list of custom type from a given category [duplicate]

Hi,

I created a custom post type called “news” and custom categories called “news_category” to have them categorized. I want to list “news” posts that belong to one of these categories. In this case the category id is 83. This is my code:

This will produce nothing despite category ID is correct. If I use a 0 instead then it lists all posts regardless of their category but any other number will list nothing. Why is that?

By the way, I created the new taxonomy with this plugin: Custom post types

Thank you.

EDIT: