->core->fs;
		if ( ! $fs->isWpfsValid() ) {
			return false;
		}

		$accessType = get_filesystem_method();
		if ( 'direct' === $accessType ) {
			$file = trailingslashit( $fs->fs->abspath() ) . 'robots.txt';

			return $fs->exists( $file );
		}

		return false;
	}

	/**
	 * Get the default Robots.txt lines (excluding our own).
	 *
	 * @since   4.1.7
	 * @version 4.4.2
	 *
	 * @return string The robots.txt content rules (excluding our own).
	 */
	public function getDefaultRobotsTxtContent() {
		// First, we need to remove our filter, so that it doesn't run unintentionally.
		remove_filter( 'robots_txt', [ $this, 'buildRules' ], 10000 );

		ob_start();
		do_robots();
		if ( is_admin() ) {
			header( 'Content-Type: text/html; charset=utf-8' );
		}
		$rules = strval( ob_get_clean() );

		// Add the filter back.
		add_filter( 'robots_txt', [ $this, 'buildRules' ], 10000 );

		return $rules;
	}

	/**
	 * A check to see if the rewrite rules are set.
	 * This isn't perfect, but it will help us know in most cases.
	 *
	 * @since 4.0.0
	 *
	 * @return boolean Whether the rewrite rules are set or not.
	 */
	public function rewriteRulesExist() {
		// If we have a physical file, it's almost impossible to tell if the rewrite rules are set.
		// The only scenario is if we still get a 404.
		$response = wp_remote_get( aioseo()->helpers->getSiteUrl() . '/robots.txt' );
		if ( 299 < wp_remote_retrieve_response_code( $response ) ) {
			return false;
		}

		return true;
	}
}<br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;AIOSEO\Plugin\Common\Tools\RobotsTxt&quot; not found in /home/valigeria/public_html/wp-content/plugins/all-in-one-seo-pack-pro/app/AIOSEO.php:300
Stack trace:
#0 /home/valigeria/public_html/wp-content/plugins/all-in-one-seo-pack-pro/app/AIOSEO.php(97): AIOSEO\Plugin\AIOSEO-&gt;load()
#1 /home/valigeria/public_html/wp-content/plugins/all-in-one-seo-pack-pro/app/AIOSEO.php(76): AIOSEO\Plugin\AIOSEO-&gt;init()
#2 /home/valigeria/public_html/wp-content/plugins/all-in-one-seo-pack-pro/app/AIOSEO.php(414): AIOSEO\Plugin\AIOSEO::instance()
#3 /home/valigeria/public_html/wp-content/plugins/all-in-one-seo-pack-pro/all_in_one_seo_pack.php(96): aioseo()
#4 /home/valigeria/public_html/wp-settings.php(517): include_once('/home/valigeria...')
#5 /home/valigeria/public_html/wp-config.php(111): require_once('/home/valigeria...')
#6 /home/valigeria/public_html/wp-load.php(50): require_once('/home/valigeria...')
#7 /home/valigeria/public_html/wp-blog-header.php(13): require_once('/home/valigeria...')
#8 /home/valigeria/public_html/index.php(17): require('/home/valigeria...')
#9 {main}
  thrown in <b>/home/valigeria/public_html/wp-content/plugins/all-in-one-seo-pack-pro/app/AIOSEO.php</b> on line <b>300</b><br />