SC',
			'meta_query' => [
				'relation' => 'AND',
				[
					'relation' => 'OR',
					[
						'key' => 'last_update',
					],
					[
						'key'     => 'last_update',
						'compare' => 'NOT EXISTS',
					],
				],
				[
					'relation' => 'OR',
					[
						'key'     => 'rank_math_robots',
						'value'   => 'noindex',
						'compare' => 'NOT LIKE',
					],
					[
						'key'     => 'rank_math_robots',
						'compare' => 'NOT EXISTS',
					],
				],
			],
		];

		$args = $this->do_filter( 'sitemap/author/query', wp_parse_args( $args, $defaults ) );
		return get_users( $args );
	}

	/**
	 * Exclude users.
	 *
	 * @param array $args Array of user query arguments.
	 *
	 * @return array
	 */
	public function exclude_users( $args ) {
		$exclude = Helper::get_settings( 'sitemap.exclude_users' );
		if ( ! empty( $exclude ) ) {
			$args['exclude'] = wp_parse_id_list( $exclude );
		}

		return $args;
	}

	/**
	 * Exclude roles.
	 *
	 * @param array $args Array of user query arguments.
	 *
	 * @return array
	 */
	public function exclude_roles( $args ) {
		$exclude_roles = Helper::get_settings( 'sitemap.exclude_roles' );
		if ( ! empty( $exclude_roles ) ) {
			$args['role__not_in'] = $exclude_roles;
		}

		return $args;
	}

	/**
	 * Exclude post types.
	 *
	 * @param array $args Array of user query arguments.
	 *
	 * @return array
	 */
	public function exclude_post_types( $args ) {
		// Exclude post types.
		$public_post_types = get_post_types( [ 'public' => true ] );

		// We're not supporting sitemaps for author pages for attachments.
		unset( $public_post_types['attachment'] );

		$args['has_published_posts'] = array_keys( $public_post_types );

		return $args;
	}

	/**
	 * Get all users according to author sitemap settings.
	 *
	 * @return array
	 */
	private function get_index_users() {
		global $wpdb;
		$exclude_users       = Helper::get_settings( 'sitemap.exclude_users' );
		$exclude_roles       = Helper::get_settings( 'sitemap.exclude_roles' );
		$exclude_users_query = ! $exclude_users ? '' : 'AND post_author NOT IN ( ' . esc_sql( $exclude_users ) . ' )';
		$exclude_roles_query = '';
		$meta_query          = "(
		 		( um.meta_key = 'rank_math_robots' AND um.meta_value NOT LIKE '%noindex%' )
		 		OR um.user_id IS NULL
			)
			AND (  umt1.meta_key = 'last_update' OR umt1.user_id IS NULL )
			";
		if ( $exclude_roles ) {
			$exclude_roles_query = "AND ( umt.meta_key ='wp_capabilities' AND ( ";
			foreach ( $exclude_roles as $key => $role ) {
				$exclude_roles_query .= 0 === $key ? " umt.meta_value NOT LIKE '%" . esc_sql( $role ) . "%'" : " AND umt.meta_value NOT LIKE '%" . esc_sql( $role ) . "%'";
			}

			$exclude_roles_query .= ' ) )';
		}

		$meta_query .= $exclude_roles_query;

		$sql = "
		SELECT u.ID, umt1.meta_value as last_update
		FROM {$wpdb->users} as u
		    LEFT JOIN {$wpdb->usermeta} AS um ON ( u.ID = um.user_id AND um.meta_key = 'rank_math_robots' )
		    LEFT JOIN {$wpdb->usermeta} AS umt ON ( u.ID = umt.user_id AND umt.meta_key = 'wp_capabilities' )
		    LEFT JOIN {$wpdb->usermeta} AS umt1 ON ( u.ID = umt1.user_id AND umt1.meta_key = 'last_update' )
		    WHERE ( {$meta_query} )
		    AND u.ID IN (
		    	SELECT post_author
		    	FROM {$wpdb->posts} as p
		    	WHERE p.post_status = 'publish' AND p.post_password = ''
		    	{$exclude_users_query}
		    	)
		ORDER BY umt1.meta_value DESC
		 ";

		return $wpdb->get_results( $sql ); // phpcs:ignore
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'RankMath\Sitemap\Providers\Author' not found in /home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/html-sitemap/class-authors.php:23
Stack trace:
#0 /home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math-pro/vendor/composer/ClassLoader.php(571): include()
#1 /home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math-pro/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile('/home/candoodes...')
#2 [internal function]: Composer\Autoload\ClassLoader-&gt;loadClass('RankMath\\Sitema...')
#3 /home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/html-sitemap/class-sitemap.php(53): spl_autoload_call('RankMath\\Sitema...')
#4 /home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/class-sitemap.php(54): RankMath\Sitemap\Html\Sitemap-&gt;__construct()
#5 /home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math/includes/module/c in <b>/home/candoodesigncom/public_html/wp-content/plugins/seo-by-rank-math/includes/modules/sitemap/html-sitemap/class-authors.php</b> on line <b>23</b><br />