DB query error. Please try later.

Fatal error: Uncaught Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137 Stack trace: #0 /home/bitrix/www/bitrix/modules/main/lib/db/connection.php(330): Bitrix\Main\DB\MysqliConnection->queryInternal('SELECT \n\t`sale_...', Array, NULL) #1 /home/bitrix/www/bitrix/modules/main/lib/entity/query.php(3038): Bitrix\Main\DB\Connection->query('SELECT \n\t`sale_...') #2 /home/bitrix/www/bitrix/modules/main/lib/entity/query.php(797): Bitrix\Main\Entity\Query->query('SELECT \n\t`sale_...') #3 /home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php(290): Bitrix\Main\Entity\Query->exec() #4 /home/bitrix/www/bitrix/modules/ipol.yadost/classes/general/CIPOLYadostHelper.php(70): Bitrix\Main\Entity\DataManager::getList(Array) #5 /home/bitrix/www/bitrix/modules/ipol.yadost/classes/general/CIPOLYadostHelper.php(84): CIPOLYadostHelper::getDelivery() #6 /home/bitrix/www/bitrix/modules/ipol.yadost/classes/general/CIPOLYadost.ph in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php on line 137