[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`sender_mailing`.`ID` AS `ID`,
	`sender_mailing`.`NAME` AS `NAME`,
	`sender_mailing`.`DESCRIPTION` AS `DESCRIPTION`,
	`sender_mailing`.`IS_PUBLIC` AS `IS_PUBLIC`
FROM `b_sender_mailing` `sender_mailing` 

WHERE UPPER(`sender_mailing`.`ACTIVE`) like upper('Y')
AND UPPER(`sender_mailing`.`IS_TRIGGER`) like upper('N')
AND UPPER(`sender_mailing`.`SITE_ID`) like upper('s2')
ORDER BY `sender_mailing`.`SORT` ASC, `NAME` ASC
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:3357
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:825
#3: Bitrix\Main\ORM\Query\Query->exec()
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:500
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/home/bitrix/www/bitrix/modules/sender/lib/subscription.php:607
#5: Bitrix\Sender\Subscription::getMailingList(array)
	/home/bitrix/www/bitrix/components/bitrix/sender.subscribe/component.php:261
#6: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#7: CBitrixComponent->__includeComponent()
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#8: CBitrixComponent->includeComponent(string, array, NULL, boolean)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1039
#9: CAllMain->IncludeComponent(string, string, array)
	/home/bitrix/ext_www/s2/include/footer/subscribe.php:2
#10: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1361
#11: CAllMain->IncludeFile(string)
	/home/bitrix/www/bitrix/templates/magnet_s2/page_blocks/footer/type4.php:15
#12: include(string)
	/home/bitrix/www/bitrix/modules/nextype.magnet/classes/general/csolution.php:157
#13: Nextype\Magnet\CSolution::ShowPageBlock(string)
	/home/bitrix/www/bitrix/templates/magnet_s2/footer.php:27
#14: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog_before.php:93
#15: require(string)
	/home/bitrix/www/bitrix/modules/main/include/epilog.php:2
#16: require_once(string)
	/home/bitrix/www/bitrix/footer.php:4
#17: require(string)
	/home/bitrix/ext_www/s2/index.php:793
#18: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#19: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2