Disable Author Pages

You can disable the Author pages using one of the following methods:

(1) Through the child theme’s functions.php file (Reference)

Open your child theme’s functions.php file and paste the following PHP code:

remove_filter('template_redirect', 'redirect_canonical');
add_action('template_redirect', 'ple_disable_author_archives');

function ple_disable_author_archives() {

  if (is_author()) {
    global $wp_query;
    $wp_query->set_404();
    status_header(404);

  } else {

    redirect_canonical();

  }

}

(2) Through the Disable Author Page free plugin

(3) By overriding the author.php file (Reference)

wCreate a file named author.php inside your child theme’s root directory and paste the following code:

  <?php

    header("HTTP/1.1 301 Moved Permanently");

    header("Location: /"); 

  ?>

(4) By using the Yoast plugin

If you already have the Yoast plugin installed, you can follow the instructions here.