I\'ve been getting a 404 error on a CPT archive page, and am not sure why. I can go to the page set for the custom post type archive, but the next page /mycustomposttype/page/2 gets a 404 error.

I don\'t think that there\'s anything wrong with my code and I\'ve flushed my permalink rules and I think that the CPT is registered correctly. But my code is below. Any insights would be greatly appreciated since I can\'t see why the pages are not being found. I did some research here, and saw similar issues and tried to follow allow of the solutions presented. But no luck.

<!-- Row for main content area -->
<div class="full-width" role="main" >

 <section id="sketchbook-wall">


   <ul id="sketchbook-container" class="large-block-grid-4">
        <?php 

        $paged = (get_query_var(\'paged\')) ? get_query_var(\'paged\') : 1;
        $args = array(
          \'post_type\' => \'tn_cstm_sketchbook\',
          \'orderby\' => \'menu_order\',
          \'order\' =>  \'ASC\',
          \'posts_per_page\' => 2,
          \'paged\'=> $paged 
          );

          $loop = new WP_Query($args);
          while($loop->have_posts()) : $loop->the_post(); ?>
          <li>
            <figure class="sketch-thumb">

            <?php 
               if(get_field(\'sketch\')) {
                $sketch = get_field(\'sketch\');
                $large_image = wp_get_attachment_image_src( $sketch, \'full\' );
                $thumbnail = wp_get_attachment_image_src( $sketch, \'large\' );
                $attachment = get_post( get_field(\'sketch\') );
                $alt = get_post_meta($attachment->ID, \'_wp_attachment_image_alt\', true);
              }
            ?>    

            <a href="<?php echo $large_image[0]; ?>" data-id="<?php the_ID(); ?>"  class="reveal" >

              <img src="<?php echo $thumbnail[0]; ?>" alt="<?php echo $alt; ?>" />

            </a> 
            <figcaption>

            </figcaption>

            </figure>

          </li>

        <?php endwhile; ?>

      </ul>


  <nav>
    <?php
    // Bring $wp_query into the scope of the function
    global $wp_query;

    // Backup the original property value
    $backup_page_total = $wp_query->max_num_pages;

    // Copy the custom query property to the $wp_query object
    $wp_query->max_num_pages = $loop->max_num_pages;
    ?>

    <!-- now show the paging links -->
    <div class="alignleft"><?php next_posts_link(\'Next Entries\'); ?></div>
    <div class="alignright"><?php previous_posts_link(\'Previous Entries\'); ?></div>

    <?php
    // Finally restore the $wp_query property to it\'s original value
    $wp_query->max_num_pages = $backup_page_total;
    ?>
  </nav>


 </section>

 </div>  <!-- End Content -->


<?php

    // Register Custom Post Taxonomy
     public  function create_work_taxonomies() {
            register_taxonomy(
                \'tn_cstm_sketchbook_plugin\',
                \'tn_cstm_sketchbook\',
                array(
                    \'labels\' => array(
                        \'name\' => \'Sketchbook Categories\',
                        \'add_new_item\' => \'Add New Sketchbook Category\',
                        \'new_item_name\' => "New Sketchbook Category"
                    ),
                    \'show_ui\' => true,
                    \'show_in_nav_menus\' => true,
                    \'show_admin_column\' => true, //Show custom taxonomy in admin columns
                    \'show_tagcloud\' => false,
                    \'hierarchical\' => true,
                    \'args\' => array( \'orderby\' => \'term_order\' ),
                    \'rewrite\' => array(\'slug\' => \'sketchbook-categories\', \'with_front\' => false )
                )
            );
        }


    // Register Custom Post Type
       public function create_sketchbook_work() {
            register_post_type( \'tn_cstm_sketchbook\',
                array(
                    \'labels\' => array(
                        \'name\' => \'Sketchbook\',
                        \'singular_name\' => \'Sketchbook Page\',
                        \'add_new\' => \'Add New Sketchbook Page\',
                        \'add_new_item\' => \'Add New Sketchbook Page\',
                        \'edit\' => \'Edit Sketchbook Page\',
                        \'edit_item\' => \'Edit Sketchbook Page\',
                        \'new_item\' => \'New Sketchbook Page\',
                        \'view\' => \'View Sketchbook Page\',
                        \'view_item\' => \'View Sketchbook Pages\',
                        \'search_items\' => \'Search Sketchbook Pages\',
                        \'not_found\' => \'No Sketchbook Pages found\',
                        \'not_found_in_trash\' => \'No Sketchbook Pages Found in Trash\',
                        \'parent\' => \'Parent Sketchbook Page\'
                    ),

                    \'public\' => true,
                    \'show_in_menu\' => true,
                    \'menu_position\' => 29,
                    \'taxonomies\' => array( \'\' ),
                    \'menu_icon\' => plugins_url( \'images/sketchbook-icon.png\', __FILE__ ),
                    \'publicly_queryable\' => true,
                    \'query_var\' => true,
                    \'rewrite\' => array( \'slug\' => \'sketchbook\', \'with_front\' => false ),  
                    \'has_archive\' => true,
                    \'hierarchical\' => false,
                    \'supports\' => array( \'title\', \'page-attributes\' )
                )
            );
        }

?>