Pagination & Custom Post Types

So I’m trying to get Custom Post Type UI and WP-PageNavi.

I’m having pagination issue’s though. I keep reading all kinds of different ways to accomplish this without any luck.

Here’s my code:

<?php $loop = new WP_Query( array( 'post_type' => 'web', 'posts_per_page' => 6 ) ); ?>
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>

LOOP STUFF HERE

<?php endwhile; ?>
<?php wp_reset_postdata(); // reset the query ?>

<?php wp_pagenavi(): ?>

It all works, except when I try to go to the 2nd page of the page.

Here’s my url when trying to accomplish all this:
https://www.website.com/test/portfolio/web/page/2/
(Is this my prob?)

Here’s my code the Custom Post Type UI generates for me:

register_post_type('web', array(	'label' => 'Websites','description' => '','public' => true,'show_ui' => true,'show_in_menu' => true,'capability_type' => 'post','hierarchical' => false,'rewrite' => array('slug' => 'portfolio/web'),'query_var' => true,'menu_position' => 4,'supports' => array('title','editor','excerpt','custom-fields','thumbnail',),'labels' => array (
  'name' => 'Websites',
  'singular_name' => 'Website',
  'menu_name' => 'Websites',
  'add_new' => 'Add Website',
  'add_new_item' => 'Add New Website',
  'edit' => 'Edit',
  'edit_item' => 'Edit Website',
  'new_item' => 'New Website',
  'view' => 'View Website',
  'view_item' => 'View Website',
  'search_items' => 'Search Websites',
  'not_found' => 'No Websites Found',
  'not_found_in_trash' => 'No Websites Found in Trash',
  'parent' => 'Parent Website',
),) );

Thoughts? ANYTHING would help.
Thanks!