Catchable fatal error: Argument 1 passed to Catalog_Category_Node::loadCategoryByParent() must be an instance of Webcatalog_Category, integer given, called in /home/users/palmtour.sk/www.palmtour.sk/www/application/modules/default/controllers/NewsletterController.php on line 8 and defined in /home/users/palmtour.sk/www.palmtour.sk/www/library/Catalog/Category/Node.php on line 84