Why doesn’t the pagination on the tag page on the wordpress site?

please help not working pagination on the tag page on the website WordPress. Appears and appears, but when going on page 2 of the 404 error.

My code to display records in the current tag:

<div class="background-type-2">
     <div class="main-content">
      <div class="line-ver">
       <div class="wrapper">
        <?php get_sidebar('blog'); ?>
        <div id="container">
           <div id="content" class="blog" role="main">
           <?php
           $current_page = (get_query_var('paged')) ? get_query_var('paged') : 1; 
           $tag = get_queried_object();
           $args = array(
            'posts_per_page' => 7, 
            'tag' => $tag->slug,
            'paged'=> $current_page
            );
           query_posts($args);
           $wp_query->is_archive = true;
           $wp_query->is_home = false;
           while(have_posts()): the_post();
           ?>
           <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
            <div class="post_headline">
               <h3><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h3>
           </div>
    </article>
    <?php
    endwhile;
    if (function_exists('custom_pagination')) {
        custom_pagination($query->max_num_pages,"",$paged);
    }
    wp_reset_query();
    ?>
    </div><!-- #content -->

</div><!-- #container -->
</div>
</div>
</div>
</div>

My custom pagination:

function custom_pagination($numpages = '', $pagerange = '', $paged='') {

    if (empty($pagerange)) {
        $pagerange = 2;
    }

    /**
     * This first part of our function is a fallback
     * for custom pagination inside a regular loop that
     * uses the global $paged and global $wp_query variables.
     *
     * It's good because we can now override default pagination
     * in our theme, and use this function in default quries
     * and custom queries.
     */
    global $paged;
    if (empty($paged)) {
        $paged = 1;
    }
    if ($numpages == '') {
        global $wp_query;
        $numpages = $wp_query->max_num_pages;
        if(!$numpages) {
            $numpages = 1;
        }
    }

    /**
     * We construct the pagination arguments to enter into our paginate_links
     * function.
     */
    $pagination_args = array(
        'base'            => get_pagenum_link(1) . '%_%',
        'format'          => 'page/%#%',
        'total'           => $numpages,
        'current'         => $paged,
        'show_all'        => False,
        'end_size'        => 1,
        'mid_size'        => $pagerange,
        'prev_next'       => True,
        'prev_text'       => __('<i class="fa fa-angle-left fa-lg" aria-hidden="true"></i>'),
        'next_text'       => __('<i class="fa fa-angle-right fa-lg" aria-hidden="true"></i>'),
        'type'            => 'plain',
        'add_args'        => false,
        'add_fragment'    => ''
    );

    $paginate_links = paginate_links($pagination_args);

    if ($paginate_links) {
        echo "<nav class='custom-pagination'>";
        echo $paginate_links;
        echo "</nav>";
    }

}

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