Fatal error: Uncaught TypeError: Argument 2 passed to TiendamiaCatalog_Product_Model_Product::_addProductDetails() must be of the type string, null given, called in /var/www/html/app/code/local/TiendamiaCatalog/Product/Model/Product.php on line 835 and defined in /var/www/html/app/code/local/TiendamiaCatalog/Product/Model/Product.php:249 Stack trace: #0 /var/www/html/app/code/local/TiendamiaCatalog/Product/Model/Product.php(835): TiendamiaCatalog_Product_Model_Product->_addProductDetails('return_message', NULL, '', 'label', 'Usted puede dev...') #1 /var/www/html/app/code/local/TiendamiaCatalog/Product/Model/Product.php(189): TiendamiaCatalog_Product_Model_Product->_prepareProductRenderDetails() #2 /var/www/html/app/code/local/TiendamiaCatalog/Product/controllers/IndexController.php(60): TiendamiaCatalog_Product_Model_Product->getProductRenderData() #3 /var/www/html/app/code/local/Mage/Core/Controller/Varien/Action.php(417): TiendamiaCatalog_Product_IndexController->indexAction() #4 /var/www/html/app/code/core/Mage/Core/Co in /var/www/html/app/code/local/TiendamiaCatalog/Product/Model/Product.php on line 249