[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`currency_currency_lang`.`CURRENCY` AS `CURRENCY`,
	`currency_currency_lang`.`LID` AS `LID`,
	`currency_currency_lang`.`FORMAT_STRING` AS `FORMAT_STRING`,
	`currency_currency_lang`.`FULL_NAME` AS `FULL_NAME`,
	`currency_currency_lang`.`DEC_POINT` AS `DEC_POINT`,
	`currency_currency_lang`.`THOUSANDS_SEP` AS `THOUSANDS_SEP`,
	`currency_currency_lang`.`DECIMALS` AS `DECIMALS`,
	`currency_currency_lang`.`THOUSANDS_VARIANT` AS `THOUSANDS_VARIANT`,
	`currency_currency_lang`.`HIDE_ZERO` AS `HIDE_ZERO`,
	`currency_currency_lang`.`CREATED_BY` AS `CREATED_BY`,
	`currency_currency_lang`.`DATE_CREATE` AS `DATE_CREATE`,
	`currency_currency_lang`.`MODIFIED_BY` AS `MODIFIED_BY`,
	`currency_currency_lang`.`TIMESTAMP_X` AS `TIMESTAMP_X`
FROM `b_catalog_currency_lang` `currency_currency_lang` 

WHERE `currency_currency_lang`.`CURRENCY` = 'RUB'
AND `currency_currency_lang`.`LID` = 'ru'
/home/youngpig/public_html/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/youngpig/public_html/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
	/home/youngpig/public_html/bitrix/modules/main/lib/entity/query.php:1924
#2: Bitrix\Main\Entity\Query->query(string)
	/home/youngpig/public_html/bitrix/modules/main/lib/entity/query.php:505
#3: Bitrix\Main\Entity\Query->exec()
	/home/youngpig/public_html/bitrix/modules/main/lib/entity/datamanager.php:256
#4: Bitrix\Main\Entity\DataManager::getList(array)
	/home/youngpig/public_html/bitrix/modules/main/lib/entity/datamanager.php:134
#5: Bitrix\Main\Entity\DataManager::getByPrimary(array)
	/home/youngpig/public_html/bitrix/modules/conversion/lib/utils.php:63
#6: Bitrix\Conversion\Utils::getBaseCurrencyUnit()
	/home/youngpig/public_html/bitrix/modules/sale/lib/internals/conversionhandlers.php:47
#7: Bitrix\Sale\Internals\ConversionHandlers::onGetRateTypes()
	/home/youngpig/public_html/bitrix/modules/main/classes/general/module.php:490
#8: ExecuteModuleEventEx(array)
	/home/youngpig/public_html/bitrix/modules/conversion/lib/internals/typemanager.php:22
#9: Bitrix\Conversion\Internals\TypeManager::getTypesInternal()
	/home/youngpig/public_html/bitrix/modules/conversion/lib/config.php:71
#10: Bitrix\Conversion\Config::getModules()
	/home/youngpig/public_html/bitrix/modules/conversion/lib/internals/typemanager.php:70
#11: Bitrix\Conversion\Internals\TypeManager::getTypes()
	/home/youngpig/public_html/bitrix/modules/conversion/lib/internals/basecontext.php:102
#12: Bitrix\Conversion\Internals\BaseContext->setAttribute(string, string)
	/home/youngpig/public_html/bitrix/modules/conversion/lib/internals/handlers.php:94
#13: Bitrix\Conversion\Internals\Handlers::Bitrix\Conversion\Internals\{closure}(object)
	/home/youngpig/public_html/bitrix/modules/conversion/lib/internals/handlers.php:270
#14: Bitrix\Conversion\Internals\Handlers::onSetDayContextAttributes(object)
	/home/youngpig/public_html/bitrix/modules/main/classes/general/module.php:490
#15: ExecuteModuleEventEx(array, array)
	/home/youngpig/public_html/bitrix/modules/conversion/lib/daycontext.php:242
#16: Bitrix\Conversion\DayContext->saveInstance()
	/home/youngpig/public_html/bitrix/modules/conversion/lib/daycontext.php:210
#17: Bitrix\Conversion\DayContext::getInstance()
	/home/youngpig/public_html/bitrix/modules/conversion/lib/internals/handlers.php:297
#18: Bitrix\Conversion\Internals\Handlers::onProlog()
	/home/youngpig/public_html/bitrix/modules/main/classes/general/module.php:490
#19: ExecuteModuleEventEx(array)
	/home/youngpig/public_html/bitrix/modules/main/classes/general/main.php:3552
#20: CAllMain::PrologActions()
	/home/youngpig/public_html/bitrix/modules/main/include/prolog_before.php:16
#21: require_once(string)
	/home/youngpig/public_html/bitrix/modules/main/include/prolog.php:10
#22: require_once(string)
	/home/youngpig/public_html/bitrix/header.php:1
#23: require(string)
	/home/youngpig/public_html/catalog/index.php:2
#24: include_once(string)
	/home/youngpig/public_html/bitrix/modules/main/include/urlrewrite.php:159
#25: include_once(string)
	/home/youngpig/public_html/404.php:2