Mensaje de error

Recoverable fatal error: Argument 1 passed to xmlsitemap_node_create_link() must be an instance of stdClass, boolean given, called in /var/www/vhosts/vivaltis.com/httpdocs/sites/all/modules/xmlsitemap/xmlsitemap_node/xmlsitemap_node.module on line 28 and defined en xmlsitemap_node_create_link() (línea 194 de /var/www/vhosts/vivaltis.com/httpdocs/sites/all/modules/xmlsitemap/xmlsitemap_node/xmlsitemap_node.module).