function travel_theme_setup() {
    add_theme_support('title-tag');
    add_theme_support('post-thumbnails');
}

add_action('after_setup_theme', 'travel_theme_setup');

function travel_theme_scripts() {
    wp_enqueue_style(
        'tailwind',
        get_template_directory_uri() . '/assets/css/style.css',
        [],
        '1.0'
    );
}
add_action('wp_enqueue_scripts', 'travel_theme_scripts');<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/hxstage/public_html/ritika.hxstage.com/wp-content/themes/travel-basic-theme/functions.php:1) in <b>/home/hxstage/public_html/ritika.hxstage.com/wp-includes/sitemaps/class-wp-sitemaps-renderer.php</b> on line <b>126</b><br />
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://ritika.hxstage.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://ritika.hxstage.com/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>https://ritika.hxstage.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://ritika.hxstage.com/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>https://ritika.hxstage.com/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>