<br />
<b>Fatal error</b>:  Uncaught Exception: Error: Unknown column 'ps_cat.sort_order' in 'order clause'&lt;br /&gt;Error No: 1054&lt;br /&gt;
			SELECT 
				p.product_id, 
				(
					SELECT AVG(rating) total 
					FROM `review` r1 
					WHERE 
						r1.product_id = p.product_id 
						AND r1.status = '1' 
					GROUP BY r1.product_id
				) rating, 
				(
					SELECT price 
					FROM `product_discount` pd2 
					WHERE 
						pd2.product_id = p.product_id 
						AND pd2.customer_group_id = '1' 
						AND pd2.quantity = '1' 
						AND ((pd2.date_start = '0000-00-00' OR pd2.date_start &lt; NOW()) 
						AND (pd2.date_end = '0000-00-00' OR pd2.date_end &gt; NOW())) 
					ORDER BY pd2.priority ASC, pd2.price ASC LIMIT 1
				) discount, 
				(
					SELECT price 
					FROM `product_special` ps 
					WHERE 
						ps.product_id = p.product_id 
						AND ps.customer_group_id = '1' 
						AND ((ps.date_start = '0000-00-00' OR ps.date_start &lt; NOW()) 
						AND (ps.date_end = '0000-00-00' OR ps.date_end &gt; NOW())) 
					ORDER BY ps.priority ASC, ps.price ASC LIMIT 1 in <b>/www/wwwroot/3roodq8.com/system/library/db/mysqli.php</b> on line <b>48</b><br />