Fehlermeldung

• Warning: Cannot modify header information - headers already sent by (output started at /lv7/www/www_d7/sw_01/includes/bootstrap.inc:1640) in drupal_send_headers() (Zeile 1499 von /lv7/www/www_d7/sw_01/includes/bootstrap.inc).
• TypeError: Argument 1 passed to xmlsitemap_node_create_link() must be an instance of stdClass, boolean given, called in /lv7/www/www_d7/sw_01/sites/all/modules/xmlsitemap/xmlsitemap_node/xmlsitemap_node.module on line 28 in xmlsitemap_node_create_link() (Zeile 194 von /lv7/www/www_d7/sw_01/sites/all/modules/xmlsitemap/xmlsitemap_node/xmlsitemap_node.module).