[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SET collation_connection = "utf8_unicode_ci"
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:379
#2: Bitrix\Main\DB\Connection->queryExecute
	/home/bitrix/www/bitrix/php_interface/after_connect_d7.php:4
#3: include(string)
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:921
#4: Bitrix\Main\DB\Connection->afterConnected
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:81
#5: Bitrix\Main\DB\MysqliConnection->connectInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:122
#6: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#7: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/config/option.php:226
#8: Bitrix\Main\Config\Option::load
	/home/bitrix/www/bitrix/modules/main/lib/config/option.php:53
#9: Bitrix\Main\Config\Option::get
	/home/bitrix/www/bitrix/modules/main/lib/httprequest.php:370
#10: Bitrix\Main\HttpRequest->prepareCookie
	/home/bitrix/www/bitrix/modules/main/lib/httprequest.php:68
#11: Bitrix\Main\HttpRequest->__construct
	/home/bitrix/www/bitrix/modules/main/lib/httpapplication.php:46
#12: Bitrix\Main\HttpApplication->initializeContext
	/home/bitrix/www/bitrix/modules/main/lib/application.php:122
#13: Bitrix\Main\Application->initializeExtendedKernel
	/home/bitrix/www/bitrix/modules/main/include.php:23
#14: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#15: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#16: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#17: require(string)
	/home/bitrix/www/catalog/index.php:1
#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