Error message

• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in include_once() (line 211 of /data/sites/web/restohenribe/www/sites/default/settings.php).
• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in drupal_send_headers() (line 1237 of /data/sites/web/restohenribe/www/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in drupal_send_headers() (line 1237 of /data/sites/web/restohenribe/www/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in drupal_send_headers() (line 1237 of /data/sites/web/restohenribe/www/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in drupal_send_headers() (line 1237 of /data/sites/web/restohenribe/www/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in drupal_send_headers() (line 1237 of /data/sites/web/restohenribe/www/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /data/sites/web/restohenribe/www/index.php:27) in drupal_send_headers() (line 1237 of /data/sites/web/restohenribe/www/includes/bootstrap.inc).