[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`currency_currency`.`CURRENCY` AS `CURRENCY`
FROM `b_catalog_currency` `currency_currency` 

WHERE `currency_currency`.`BASE` = 'Y'
AND `currency_currency`.`AMOUNT` = 1
/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/lib/orm/query/query.php:3398
#2: Bitrix\Main\ORM\Query\Query->query(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/lib/orm/query/query.php:825
#3: Bitrix\Main\ORM\Query\Query->exec()
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/lib/orm/data/datamanager.php:500
#4: Bitrix\Main\ORM\Data\DataManager::getList(array)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/currency/lib/currencymanager.php:81
#5: Bitrix\Currency\CurrencyManager::getBaseCurrency()
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/currency/mysql/currency_rate.php:12
#6: CCurrencyRates::_get_last_rates(string, string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/currency/general/currency_rate.php:419
#7: CAllCurrencyRates::GetConvertFactorEx(string, string, string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/currency/general/currency_rate.php:327
#8: CAllCurrencyRates::ConvertCurrency(double, string, string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/catalog/general/product.php:1109
#9: CAllCatalogProduct::GetOptimalPrice(integer, double, array, string, array)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/dw.deluxe/classes/general/prices.php:152
#10: DwPrices::getPricesByProductId(string, array, array, array, string, string)
	/var/www/www-root/data/www/server-expert.com/bitrix/components/dresscode/catalog.item/component.php:434
#11: include(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component.php:605
#12: CBitrixComponent->__includeComponent()
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component.php:680
#13: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/main.php:1041
#14: CAllMain->IncludeComponent(string, string, array, boolean, array)
	/var/www/www-root/data/www/server-expert.com/bitrix/templates/dresscodeV2_copy/components/bitrix/catalog/.default/element.php:129
#15: include(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component_template.php:789
#16: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component_template.php:884
#17: CBitrixComponentTemplate->IncludeTemplate(array)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component.php:764
#18: CBitrixComponent->showComponentTemplate()
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component.php:712
#19: CBitrixComponent->includeComponentTemplate(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/components/bitrix/catalog/component.php:171
#20: include(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component.php:605
#21: CBitrixComponent->__includeComponent()
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/component.php:680
#22: CBitrixComponent->includeComponent(string, array, NULL, boolean)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/classes/general/main.php:1041
#23: CAllMain->IncludeComponent(string, string, array)
	/var/www/www-root/data/www/server-expert.com/catalog/index.php:10
#24: include_once(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/modules/main/include/urlrewrite.php:159
#25: include_once(string)
	/var/www/www-root/data/www/server-expert.com/bitrix/urlrewrite.php:2