Page not found when clicking on pagination tab

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First thing:

Category archives default to using this permalink/URL structure:

http://example.com/category/<category slug>/ (for page #1)
http://example.com/category/<category slug>/page/<page number>/ (for page #2, #3, and so on)

So when you visit http://example.com/category/accessories/page/2/, WordPress will automatically make a call to WP_Query and the parameters being used are retrieved from the current page URL:

WP_Query( array(
  'category_name' => 'accessories', // the <category slug> in the URL
  'paged'         => 2,             // the <page number> in the URL
) );

And that is the main query.

So when the paged value is greater than the max number of pages for the main query, then a 404 error page would be displayed. And in your case, does the category accessories actually have enough number of posts for the archive page to have a page #2? I bet no.

Second thing:

Category templates should just display posts retrieved via the main query:

while ( have_posts() ) {
    the_post();
    // Display the post.
}

But I’m not seeing that anywhere in your code.

Third thing:

You can use pre_get_posts to alter the main query by modifying its parameters:

// This should go in your theme's functions.php file.
add_action( 'pre_get_posts', function ( $query ) {
    // Set the number of posts per page to 6, but only on category archives.
    if ( ! $query->is_admin && $query->is_main_query() && is_category() ) {
        $query->set( 'posts_per_page', 6 );
    }
} );

Then in your code, there’s no necessity for this:

$args = array('posts_per_page' => 6,'paged'=> $paged,);
$tyler_query = new WP_Query( $args ); // secondary query

Additionally:

  1. Change the $tyler_query->have_posts() to have_posts().

  2. Then change the $tyler_query->the_post() to the_post().

  3. Just use <?php next_posts_link(); ?> without having to pass the max number of pages (the $tyler_query->max_num_pages in your code).