Fallo General:
Invalid SQL: SELECT pk_product_category, pk_product, str_product_name_es, str_product_image1, fk_family FROM product_categories, products WHERE is_home=1 AND fk_product_category=pk_product_category AND fk_season = ORDER BY RAND()

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Location: /var/www/vhosts/contactshoes.com/httpdocs/includes/functions.php
	 $this->doQuery('SELECT pk_product_category, pk_product, str_product_name_es, str_product_image1, fk_family 
				FROM product_categories, products
				WHERE is_home=1
				AND fk_product_category=pk_product_category
				AND fk_season = 
				ORDER BY RAND()') at Line (1122) 

	Location: /var/www/vhosts/contactshoes.com/httpdocs/default.php
		 getHomeProducts('es') at Line (57)