Hi Gummi!
Thank you! You have absolutely right!!!
Now work well.
I have set the variable inside the while, using get_sub_field because it’s inside of one Repeater Field. $category = get_sub_field('latest_news')
.
Also I have set the Taxonomy Filed inside the post.
And the 'category_name' => $category->slug,
work perfectly!
Thank you so much!