Fatal error: Uncaught Exception: Error: MySQL server has gone away<br />Error No: 2006<br />
			SELECT 
				SUM(op.quantity) AS quantity 
			FROM `oc_order_product` op 
			LEFT JOIN `oc_order` o ON op.order_id = o.order_id 
			WHERE o.order_status_id <> 0 AND op.product_id = '6756'
		 in /home/flanart3/public_html/system/library/db/mysqli.php:40
Stack trace:
#0 /home/flanart3/public_html/system/storage/modification/system/library/db.php(29): DB\MySQLi->query('\n\t\t\tSELECT \n\t\t\t...', Array)
#1 /home/flanart3/public_html/system/library/journal3/opencart/model.php(38): DB->query('\n\t\t\tSELECT \n\t\t\t...')
#2 /home/flanart3/public_html/catalog/model/journal3/product.php(477): Journal3\Opencart\Model->dbQuery('\n\t\t\tSELECT \n\t\t\t...')
#3 /home/flanart3/public_html/system/storage/modification/system/engine/loader.php(204): ModelJournal3Product->getProductsSold('6756')
#4 /home/flanart3/public_html/system/engine/proxy.php(25): Loader->{closure}(Array, Array)
#5 /home/flanart3/public_html/system/storage/modification/c in /home/flanart3/public_html/system/library/db/mysqli.php on line 40