Custom Post Type Error

I create own Custom Post Type and add to functions.php

add_action( 'init', 'create_artists' );
function create_artists() {
	register_post_type( 'artistspage',
		array(
			'labels' => array(
				'name'                => _x( 'Artists', 'Post Type General Name', 'text_domain' ),
                'singular_name'       => _x( 'Artist', 'Post Type Singular Name', 'text_domain' ),
                'menu_name'           => __( 'Artist', 'text_domain' ),
                'parent_item_colon'   => __( 'Parent Artist:', 'text_domain' ),
                'all_items'           => __( 'All Artists', 'text_domain' ),
                'view_item'           => __( 'View Artist', 'text_domain' ),
                'add_new_item'        => __( 'Add New Artist', 'text_domain' ),
                'add_new'             => __( 'New Artist', 'text_domain' ),
                'edit_item'           => __( 'Edit Artist', 'text_domain' ),
                'update_item'         => __( 'Update Artist', 'text_domain' ),
                'search_items'        => __( 'Search Artists', 'text_domain' ),
                'not_found'           => __( 'No products found', 'text_domain' ),
                'not_found_in_trash'  => __( 'No products found in Trash', 'text_domain' ),
			),
			'public'              => true,
			'rewrite'             => array('slug' => 'artists', 'with_front' => false),
            'supports'            => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments', 'custom-fields'),
            'hierarchical'        => false,
            'public'              => true,
            'show_ui'             => true,
            'show_in_menu'        => true,
            'show_in_nav_menus'   => true,
            'show_in_admin_bar'   => true,
            'menu_position'       => 5,
            'can_export'          => true,
            'has_archive'         => true,
            'exclude_from_search' => false,
            'publicly_queryable'  => true,
            'capability_type'     => 'page',
            'has_archive' => true
		)
	);
    //flush_rewrite_rules();
}

Then I add 7 Custom Post data on it and try to call them at archive-artistspage.php by following this code

<?php  

                        if ( get_query_var('paged') ) { $paged = get_query_var('paged'); }
                        elseif ( get_query_var('page') ) { $paged = get_query_var('page'); }
                        else { $paged = 1; }
                        $args = array (
                            'post_type'          => 'artistspage',
                            'posts_per_page'     => 6,
                            'order'              => 'ASC',
                            'orderby'            => 'modified',
                            'paged'              => $paged
                        );
                        // The Query
                        $wp_query = new WP_Query( $args );
                        //print_r($wp_query->request);
                        while ( $wp_query->have_posts() ) : $wp_query->the_post();
                        ?>
                            <div class="thumb-who">
                                <a href="<?php the_permalink(); ?>">
                                <?php the_post_thumbnail('who-thumb'); ?>
                                </a>
                                <h2><a href="<?php the_permalink() ?>" rel="bookmark"><?php the_title(); ?></a></h2>
                                <p><?php the_excerpt(); ?></p>
                                <a href="<?php the_permalink() ?>" id="read-more" rel="bookmark">Read More ></a>
                            </div>
                        <?php

                        endwhile;
                        wp_pagenavi( array( 'query' => $wp_query ) );
                        wp_reset_postdata();	// avoid errors further down the page

                    ?>

I get result at https://www.domain.tld/artists but get 404 error when I am click on Pagenavi 2

But I am get the Page 2 result at https://domain.tld/?post_type=artistspage&page=2

I try to add this on my functions.php

add_action('init', 'event_archive_rewrite');
function event_archive_rewrite(){
    add_rewrite_rule('^artists/([^/]*)/([^/]*)/?','index.php?post_type=artistspage&page=$matches[2]','top');
}

but no success.

Where I am doing wrong?

thank you