Fatal error: Uncaught Exception: Error: Unknown column 'ps.price' in 'order clause'<br />Error No: 1054<br />SELECT op.product_id, SUM(op.quantity) AS total FROM oc_order_product op LEFT JOIN `oc_order` o ON (op.order_id = o.order_id) LEFT JOIN `oc_product` p ON (op.product_id = p.product_id) LEFT JOIN oc_product_description pd ON (p.product_id = pd.product_id) LEFT JOIN oc_product_to_store p2s ON (p.product_id = p2s.product_id) WHERE o.order_status_id > '0' AND p.status = '1' AND p.date_available <= NOW() AND p2s.store_id = '0' GROUP BY op.product_id ORDER BY ps.price ASC, LCASE(pd.name) ASC LIMIT 0,15 in /home/webvolty/public_html/marketplace/system/library/db/mysqli.php:40 Stack trace: #0 /home/webvolty/public_html/marketplace/system/library/db.php(45): DB\MySQLi->query('SELECT op.produ...') #1 /home/webvolty/public_html/marketplace/catalog/model/catalog/product.php(585): DB->query('SELECT op.produ...') #2 /home/webvolty/public_html/marketplace/system/storage/modification/system/engine/loader.php(251): in /home/webvolty/public_html/marketplace/system/library/db/mysqli.php on line 40