Ошибка в SQL запросе:
SELECT CONCAT(c.parent_url,c.url) AS category_url, p.url AS product_url, p.*, rate,
(p.price_course + p.price_course * (IFNULL(rate,0))) as `price_course`, p.currency_iso
FROM `mg_product` AS p
LEFT JOIN `mg_category` AS c ON c.id = p.cat_id
WHERE p.id IN (4100,4885,6533,4884,4207,6536,2128,3387,3383,5809,7467,6473,4201,7471,5976,4209,2144,4101,6882,6460,4703,3182,4196,6535,2877,4704,4200,4705,6524,579,4205,4048,6534,4810,7468,3580,4808,3109,4883,6538,7475,7048,6209,4709,6559,3521,6888,3607,6463,4708) MySQL server has gone away
/var/www/meberry/data/www/meberry.ru/mg-core/lib/smalcart.php (line 82)
/var/www/meberry/data/www/meberry.ru/mg-core/lib/mg.php (line 605)
/var/www/meberry/data/www/meberry.ru/mg-core/lib/mg.php (line 1143)
/var/www/meberry/data/www/meberry.ru/mg-core/lib/mg.php (line 1228)
/var/www/meberry/data/www/meberry.ru/mg-core/lib/mg.php (line 1206)
/var/www/meberry/data/www/meberry.ru/mg-core/lib/mg.php (line 752)
/var/www/meberry/data/www/meberry.ru/mg-core/mg-start.php (line 53)
/var/www/meberry/data/www/meberry.ru/index.php (line 80)