[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SET sql_mode=''
/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/connection.php:379
#2: Bitrix\Main\DB\Connection->queryExecute
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/php_interface/after_connect_d7.php:6
#3: include(string)
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/connection.php:984
#4: Bitrix\Main\DB\Connection->afterConnected
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/mysqliconnection.php:81
#5: Bitrix\Main\DB\MysqliConnection->connectInternal
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/mysqliconnection.php:122
#6: Bitrix\Main\DB\MysqliConnection->queryInternal
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/connection.php:330
#7: Bitrix\Main\DB\Connection->query
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/lib/db/connection.php:358
#8: Bitrix\Main\DB\Connection->queryScalar
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/security/lib/session.php:114
#9: Bitrix\Security\SessionTable::lock
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/security/classes/general/session_db.php:52
#10: CSecuritySessionDB::read
	
#11: session_start
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/include.php:288
#12: require_once(string)
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/include/prolog_before.php:14
#13: require_once(string)
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/modules/main/include/prolog.php:10
#14: require_once(string)
	/var/www/u3670jh4607/data/www/kanc10.ru/bitrix/header.php:1
#15: require(string)
	/var/www/u3670jh4607/data/www/kanc10.ru/catalog/index.php:2