Updated website getting fatal php error and warning

Trying to update a outdated site, backup old site and downloaded the updated now getting this message

PHP Warning: require_once(G:\PleskVhosts\bodiesbybullz.com\httpdocs/wp-admin/includes/plugin.php): failed to open stream: No such file or directory in G:\PleskVhosts\bodiesbybullz.com\httpdocs\wp-content\plugins\backupwordpress\backupwordpress.php on line 340
PHP Fatal error: require_once(): Failed opening required ‘G:\PleskVhosts\bodiesbybullz.com\httpdocs/wp-admin/includes/plugin.php’ (include_path=’.;.\includes;.\pear’) in G:\PleskVhosts\bodiesbybullz.com\httpdocs\wp-content\plugins\backupwordpress\backupwordpress.php on line 340

tried to download plugin.php through FTP fileZilla and nothing seemed to have happened

bodiesbybulls.com

Thanks!