Warning: require(vendor/autoload.php): failed to open stream: No such file or directory in /home/bate/public_html/sitemap.xml.php on line 8

Warning: require(vendor/autoload.php): failed to open stream: No such file or directory in /home/bate/public_html/sitemap.xml.php on line 8

Fatal error: require(): Failed opening required 'vendor/autoload.php' (include_path='.:/opt/alt/php54/usr/share/pear:/opt/alt/php54/usr/share/php') in /home/bate/public_html/sitemap.xml.php on line 8